[py3] Replaced basestring by six.string_types.

django/conf/__init__.py

@@ -15,6 +15,7 @@ from django.conf import global_settings
 from django.core.exceptions import ImproperlyConfigured
 from django.utils.functional import LazyObject, empty
 from django.utils import importlib
+from django.utils import six
 
 ENVIRONMENT_VARIABLE = "DJANGO_SETTINGS_MODULE"
 
@@ -73,7 +74,7 @@ class BaseSettings(object):
         elif name == "ADMIN_MEDIA_PREFIX":
             warnings.warn("The ADMIN_MEDIA_PREFIX setting has been removed; "
                           "use STATIC_URL instead.", DeprecationWarning)
-        elif name == "ALLOWED_INCLUDE_ROOTS" and isinstance(value, basestring):
+        elif name == "ALLOWED_INCLUDE_ROOTS" and isinstance(value, six.string_types):
             raise ValueError("The ALLOWED_INCLUDE_ROOTS setting must be set "
                 "to a tuple, not a string.")
         object.__setattr__(self, name, value)
@@ -102,7 +103,7 @@ class Settings(BaseSettings):
             if setting == setting.upper():
                 setting_value = getattr(mod, setting)
                 if setting in tuple_settings and \
-                        isinstance(setting_value, basestring):
+                        isinstance(setting_value, six.string_types):
                     warnings.warn("The %s setting must be a tuple. Please fix your "
                                   "settings, as auto-correction is now deprecated." % setting,
                         PendingDeprecationWarning)

django/conf/urls/__init__.py

@@ -2,6 +2,7 @@ from django.core.urlresolvers import (RegexURLPattern,
     RegexURLResolver, LocaleRegexURLResolver)
 from django.core.exceptions import ImproperlyConfigured
 from django.utils.importlib import import_module
+from django.utils import six
 
 
 __all__ = ['handler403', 'handler404', 'handler500', 'include', 'patterns', 'url']
@@ -20,7 +21,7 @@ def include(arg, namespace=None, app_name=None):
         # No namespace hint - use manually provided namespace
         urlconf_module = arg
 
-    if isinstance(urlconf_module, basestring):
+    if isinstance(urlconf_module, six.string_types):
         urlconf_module = import_module(urlconf_module)
     patterns = getattr(urlconf_module, 'urlpatterns', urlconf_module)
 
@@ -52,7 +53,7 @@ def url(regex, view, kwargs=None, name=None, prefix=''):
         urlconf_module, app_name, namespace = view
         return RegexURLResolver(regex, urlconf_module, kwargs, app_name=app_name, namespace=namespace)
     else:
-        if isinstance(view, basestring):
+        if isinstance(view, six.string_types):
             if not view:
                 raise ImproperlyConfigured('Empty URL pattern view name not permitted (for pattern %r)' % regex)
             if prefix:

django/contrib/admin/helpers.py

@@ -12,6 +12,7 @@ from django.template.defaultfilters import capfirst
 from django.utils.encoding import force_unicode, smart_unicode
 from django.utils.html import conditional_escape, format_html
 from django.utils.safestring import mark_safe
+from django.utils import six
 from django.utils.translation import ugettext_lazy as _
 from django.conf import settings
 
@@ -49,7 +50,7 @@ class AdminForm(object):
         try:
             fieldset_name, fieldset_options = self.fieldsets[0]
             field_name = fieldset_options['fields'][0]
-            if not isinstance(field_name, basestring):
+            if not isinstance(field_name, six.string_types):
                 field_name = field_name[0]
             return self.form[field_name]
         except (KeyError, IndexError):

django/contrib/admin/util.py

@@ -52,7 +52,7 @@ def quote(s):
     quoting is slightly different so that it doesn't get automatically
     unquoted by the Web browser.
     """
-    if not isinstance(s, basestring):
+    if not isinstance(s, six.string_types):
         return s
     res = list(s)
     for i in range(len(res)):

django/contrib/formtools/utils.py

@@ -2,6 +2,7 @@
 import pickle
 
 from django.utils.crypto import salted_hmac
+from django.utils import six
 
 
 def form_hmac(form):
@@ -16,7 +17,7 @@ def form_hmac(form):
             value = bf.data or ''
         else:
             value = bf.field.clean(bf.data) or ''
-        if isinstance(value, basestring):
+        if isinstance(value, six.string_types):
             value = value.strip()
         data.append((bf.name, value))
 

django/contrib/gis/admin/widgets.py

@@ -1,6 +1,7 @@
 from django.forms.widgets import Textarea
 from django.template import loader, Context
 from django.templatetags.static import static
+from django.utils import six
 from django.utils import translation
 
 from django.contrib.gis.gdal import OGRException
@@ -25,7 +26,7 @@ class OpenLayersWidget(Textarea):
 
         # If a string reaches here (via a validation error on another
         # field) then just reconstruct the Geometry.
-        if isinstance(value, basestring):
+        if isinstance(value, six.string_types):
             try:
                 value = GEOSGeometry(value)
             except (GEOSException, ValueError):
@@ -109,7 +110,7 @@ class OpenLayersWidget(Textarea):
         """ Compare geographic value of data with its initial value. """
 
         # Ensure we are dealing with a geographic object
-        if isinstance(initial, basestring):
+        if isinstance(initial, six.string_types):
             try:
                 initial = GEOSGeometry(initial)
             except (GEOSException, ValueError):

django/contrib/gis/db/backends/oracle/operations.py

@@ -121,7 +121,7 @@ class OracleOperations(DatabaseOperations, BaseSpatialOperations):
         'exact' : SDOOperation('SDO_EQUAL'),
         'overlaps' : SDOOperation('SDO_OVERLAPS'),
         'same_as' : SDOOperation('SDO_EQUAL'),
-        'relate' : (SDORelate, basestring), # Oracle uses a different syntax, e.g., 'mask=inside+touch'
+        'relate' : (SDORelate, six.string_types), # Oracle uses a different syntax, e.g., 'mask=inside+touch'
         'touches' : SDOOperation('SDO_TOUCH'),
         'within' : SDOOperation('SDO_INSIDE'),
         }

django/contrib/gis/db/backends/postgis/operations.py

@@ -162,7 +162,7 @@ class PostGISOperations(DatabaseOperations, BaseSpatialOperations):
             'overlaps' : PostGISFunction(prefix, 'Overlaps'),
             'contains' : PostGISFunction(prefix, 'Contains'),
             'intersects' : PostGISFunction(prefix, 'Intersects'),
-            'relate' : (PostGISRelate, basestring),
+            'relate' : (PostGISRelate, six.string_types),
             }
 
         # Valid distance types and substitutions

django/contrib/gis/db/backends/spatialite/introspection.py

@@ -1,5 +1,6 @@
 from django.contrib.gis.gdal import OGRGeomType
 from django.db.backends.sqlite3.introspection import DatabaseIntrospection, FlexibleFieldLookupDict
+from django.utils import six
 
 class GeoFlexibleFieldLookupDict(FlexibleFieldLookupDict):
     """
@@ -43,7 +44,7 @@ class SpatiaLiteIntrospection(DatabaseIntrospection):
             field_params = {}
             if srid != 4326:
                 field_params['srid'] = srid
-            if isinstance(dim, basestring) and 'Z' in dim:
+            if isinstance(dim, six.string_types) and 'Z' in dim:
                 field_params['dim'] = 3
         finally:
             cursor.close()

django/contrib/gis/db/backends/spatialite/operations.py

@@ -90,7 +90,7 @@ class SpatiaLiteOperations(DatabaseOperations, BaseSpatialOperations):
         'overlaps' : SpatiaLiteFunction('Overlaps'),
         'contains' : SpatiaLiteFunction('Contains'),
         'intersects' : SpatiaLiteFunction('Intersects'),
-        'relate' : (SpatiaLiteRelate, basestring),
+        'relate' : (SpatiaLiteRelate, six.string_types),
         # Returns true if B's bounding box completely contains A's bounding box.
         'contained' : SpatiaLiteFunction('MbrWithin'),
         # Returns true if A's bounding box completely contains B's bounding box.

django/contrib/gis/db/backends/util.py

@@ -3,13 +3,15 @@ A collection of utility routines and classes used by the spatial
 backends.
 """
 
+from django.utils import six
+
 def gqn(val):
     """
     The geographic quote name function; used for quoting tables and
     geometries (they use single rather than the double quotes of the
     backend quotename function).
     """
-    if isinstance(val, basestring):
+    if isinstance(val, six.string_types):
         if isinstance(val, unicode): val = val.encode('ascii')
         return "'%s'" % val
     else:

django/contrib/gis/db/models/fields.py

@@ -4,6 +4,7 @@ from django.utils.translation import ugettext_lazy as _
 from django.contrib.gis import forms
 from django.contrib.gis.db.models.proxy import GeometryProxy
 from django.contrib.gis.geometry.backend import Geometry, GeometryException
+from django.utils import six
 
 # Local cache of the spatial_ref_sys table, which holds SRID data for each
 # spatial database alias. This cache exists so that the database isn't queried
@@ -159,7 +160,7 @@ class GeometryField(Field):
         # from the given string input.
         if isinstance(geom, Geometry):
             pass
-        elif isinstance(geom, basestring) or hasattr(geom, '__geo_interface__'):
+        elif isinstance(geom, six.string_types) or hasattr(geom, '__geo_interface__'):
             try:
                 geom = Geometry(geom)
             except GeometryException:

django/contrib/gis/db/models/proxy.py

@@ -5,6 +5,7 @@ corresponding to geographic model fields.
 
 Thanks to Robert Coup for providing this functionality (see #4322).
 """
+from django.utils import six
 
 class GeometryProxy(object):
     def __init__(self, klass, field):
@@ -53,7 +54,7 @@ class GeometryProxy(object):
         if isinstance(value, self._klass) and (str(value.geom_type).upper() == gtype or gtype == 'GEOMETRY'):
             # Assigning the SRID to the geometry.
             if value.srid is None: value.srid = self._field.srid
-        elif value is None or isinstance(value, (basestring, buffer)):
+        elif value is None or isinstance(value, six.string_types + (buffer,)):
             # Set with None, WKT, HEX, or WKB
             pass
         else:

django/contrib/gis/db/models/query.py

@@ -8,6 +8,8 @@ from django.contrib.gis.geometry.backend import Geometry
 from django.contrib.gis.measure import Area, Distance
 from django.utils import six
 
+from django.utils import six
+
 class GeoQuerySet(QuerySet):
     "The Geographic QuerySet."
 
@@ -534,7 +536,7 @@ class GeoQuerySet(QuerySet):
             geo_field = settings['geo_field']
 
         # The attribute to attach to the model.
-        if not isinstance(model_att, basestring): model_att = att
+        if not isinstance(model_att, six.string_types): model_att = att
 
         # Special handling for any argument that is a geometry.
         for name in settings['geom_args']:

django/contrib/gis/gdal/datasource.py

@@ -45,6 +45,8 @@ from django.contrib.gis.gdal.layer import Layer
 # Getting the ctypes prototypes for the DataSource.
 from django.contrib.gis.gdal.prototypes import ds as capi
 
+from django.utils import six
+
 # For more information, see the OGR C API source code:
 #  http://www.gdal.org/ogr/ogr__api_8h.html
 #
@@ -65,7 +67,7 @@ class DataSource(GDALBase):
         if not capi.get_driver_count():
             capi.register_all()
 
-        if isinstance(ds_input, basestring):
+        if isinstance(ds_input, six.string_types):
             # The data source driver is a void pointer.
             ds_driver = Driver.ptr_type()
             try:
@@ -84,7 +86,7 @@ class DataSource(GDALBase):
             self.ptr = ds
             self.driver = Driver(ds_driver)
         else:
-            # Raise an exception if the returned pointer is NULL 
+            # Raise an exception if the returned pointer is NULL
             raise OGRException('Invalid data source file "%s"' % ds_input)
 
     def __del__(self):
@@ -98,7 +100,7 @@ class DataSource(GDALBase):
 
     def __getitem__(self, index):
         "Allows use of the index [] operator to get a layer at the index."
-        if isinstance(index, basestring):
+        if isinstance(index, six.string_types):
             l = capi.get_layer_by_name(self.ptr, index)
             if not l: raise OGRIndexError('invalid OGR Layer name given: "%s"' % index)
         elif isinstance(index, int):
@@ -108,7 +110,7 @@ class DataSource(GDALBase):
         else:
             raise TypeError('Invalid index type: %s' % type(index))
         return Layer(l, self)
-        
+
     def __len__(self):
         "Returns the number of layers within the data source."
         return self.layer_count

django/contrib/gis/gdal/driver.py

@@ -1,9 +1,11 @@
-# prerequisites imports 
+# prerequisites imports
 from ctypes import c_void_p
 from django.contrib.gis.gdal.base import GDALBase
 from django.contrib.gis.gdal.error import OGRException
 from django.contrib.gis.gdal.prototypes import ds as capi
 
+from django.utils import six
+
 # For more information, see the OGR C API source code:
 #  http://www.gdal.org/ogr/ogr__api_8h.html
 #
@@ -18,11 +20,11 @@ class Driver(GDALBase):
               'tiger' : 'TIGER',
               'tiger/line' : 'TIGER',
               }
-                
+
     def __init__(self, dr_input):
         "Initializes an OGR driver on either a string or integer input."
 
-        if isinstance(dr_input, basestring):
+        if isinstance(dr_input, six.string_types):
             # If a string name of the driver was passed in
             self._register()
 
@@ -57,7 +59,7 @@ class Driver(GDALBase):
         # Only register all if the driver count is 0 (or else all drivers
         # will be registered over and over again)
         if not self.driver_count: capi.register_all()
-                    
+
     # Driver properties
     @property
     def driver_count(self):

django/contrib/gis/gdal/feature.py

@@ -7,6 +7,8 @@ from django.contrib.gis.gdal.geometries import OGRGeometry, OGRGeomType
 # ctypes function prototypes
 from django.contrib.gis.gdal.prototypes import ds as capi, geom as geom_api
 
+from django.utils import six
+
 # For more information, see the OGR C API source code:
 #  http://www.gdal.org/ogr/ogr__api_8h.html
 #
@@ -30,17 +32,17 @@ class Feature(GDALBase):
         """
         Gets the Field object at the specified index, which may be either
         an integer or the Field's string label.  Note that the Field object
-        is not the field's _value_ -- use the `get` method instead to 
+        is not the field's _value_ -- use the `get` method instead to
         retrieve the value (e.g. an integer) instead of a Field instance.
         """
-        if isinstance(index, basestring):
+        if isinstance(index, six.string_types):
             i = self.index(index)
         else:
             if index < 0 or index > self.num_fields:
                 raise OGRIndexError('index out of range')
             i = index
         return Field(self.ptr, i)
-    
+
     def __iter__(self):
         "Iterates over each field in the Feature."
         for i in xrange(self.num_fields):
@@ -49,7 +51,7 @@ class Feature(GDALBase):
     def __len__(self):
         "Returns the count of fields in this feature."
         return self.num_fields
-        
+
     def __str__(self):
         "The string name of the feature."
         return 'Feature FID %d in Layer<%s>' % (self.fid, self.layer_name)
@@ -63,7 +65,7 @@ class Feature(GDALBase):
     def fid(self):
         "Returns the feature identifier."
         return capi.get_fid(self.ptr)
-        
+
     @property
     def layer_name(self):
         "Returns the name of the layer for the feature."
@@ -77,7 +79,7 @@ class Feature(GDALBase):
     @property
     def fields(self):
         "Returns a list of fields in the Feature."
-        return [capi.get_field_name(capi.get_field_defn(self._fdefn, i)) 
+        return [capi.get_field_name(capi.get_field_defn(self._fdefn, i))
                 for i in xrange(self.num_fields)]
 
     @property
@@ -91,7 +93,7 @@ class Feature(GDALBase):
     def geom_type(self):
         "Returns the OGR Geometry Type for this Feture."
         return OGRGeomType(capi.get_fd_geom_type(self._fdefn))
-    
+
     #### Feature Methods ####
     def get(self, field):
         """

django/contrib/gis/gdal/geometries.py

@@ -71,7 +71,7 @@ class OGRGeometry(GDALBase):
     def __init__(self, geom_input, srs=None):
         "Initializes Geometry on either WKT or an OGR pointer as input."
 
-        str_instance = isinstance(geom_input, basestring)
+        str_instance = isinstance(geom_input, six.string_types)
 
         # If HEX, unpack input to to a binary buffer.
         if str_instance and hex_regex.match(geom_input):
@@ -283,7 +283,7 @@ class OGRGeometry(GDALBase):
         # (decremented) when this geometry's destructor is called.
         if isinstance(srs, SpatialReference):
             srs_ptr = srs.ptr
-        elif isinstance(srs, six.integer_types + (basestring,)):
+        elif isinstance(srs, six.integer_types + six.string_types):
             sr = SpatialReference(srs)
             srs_ptr = sr.ptr
         else:
@@ -412,7 +412,7 @@ class OGRGeometry(GDALBase):
             capi.geom_transform(self.ptr, coord_trans.ptr)
         elif isinstance(coord_trans, SpatialReference):
             capi.geom_transform_to(self.ptr, coord_trans.ptr)
-        elif isinstance(coord_trans, six.integer_types + (basestring,)):
+        elif isinstance(coord_trans, six.integer_types + six.string_types):
             sr = SpatialReference(coord_trans)
             capi.geom_transform_to(self.ptr, sr.ptr)
         else:
@@ -687,7 +687,7 @@ class GeometryCollection(OGRGeometry):
                 for g in geom: capi.add_geom(self.ptr, g.ptr)
             else:
                 capi.add_geom(self.ptr, geom.ptr)
-        elif isinstance(geom, basestring):
+        elif isinstance(geom, six.string_types):
             tmp = OGRGeometry(geom)
             capi.add_geom(self.ptr, tmp.ptr)
         else:

django/contrib/gis/gdal/geomtype.py

@@ -1,5 +1,7 @@
 from django.contrib.gis.gdal.error import OGRException
 
+from django.utils import six
+
 #### OGRGeomType ####
 class OGRGeomType(object):
     "Encapulates OGR Geometry Types."
@@ -32,7 +34,7 @@ class OGRGeomType(object):
         "Figures out the correct OGR Type based upon the input."
         if isinstance(type_input, OGRGeomType):
             num = type_input.num
-        elif isinstance(type_input, basestring):
+        elif isinstance(type_input, six.string_types):
             type_input = type_input.lower()
             if type_input == 'geometry': type_input='unknown'
             num = self._str_types.get(type_input, None)
@@ -44,7 +46,7 @@ class OGRGeomType(object):
             num = type_input
         else:
             raise TypeError('Invalid OGR input type given.')
-        
+
         # Setting the OGR geometry type number.
         self.num = num
 
@@ -59,7 +61,7 @@ class OGRGeomType(object):
         """
         if isinstance(other, OGRGeomType):
             return self.num == other.num
-        elif isinstance(other, basestring):
+        elif isinstance(other, six.string_types):
             return self.name.lower() == other.lower()
         elif isinstance(other, int):
             return self.num == other

django/contrib/gis/gdal/srs.py

@@ -54,7 +54,7 @@ class SpatialReference(GDALBase):
         buf = c_char_p('')
         srs_type = 'user'
 
-        if isinstance(srs_input, basestring):
+        if isinstance(srs_input, six.string_types):
             # Encoding to ASCII if unicode passed in.
             if isinstance(srs_input, unicode):
                 srs_input = srs_input.encode('ascii')
@@ -135,7 +135,7 @@ class SpatialReference(GDALBase):
         The attribute value for the given target node (e.g. 'PROJCS'). The index
         keyword specifies an index of the child node to return.
         """
-        if not isinstance(target, basestring) or not isinstance(index, int):
+        if not isinstance(target, six.string_types) or not isinstance(index, int):
             raise TypeError
         return capi.get_attr_value(self.ptr, target, index)
 

django/contrib/gis/geoip/base.py

@@ -10,6 +10,8 @@ from django.contrib.gis.geoip.prototypes import (
     GeoIP_country_code_by_addr, GeoIP_country_code_by_name,
     GeoIP_country_name_by_addr, GeoIP_country_name_by_name)
 
+from django.utils import six
+
 # Regular expressions for recognizing the GeoIP free database editions.
 free_regex = re.compile(r'^GEO-\d{3}FREE')
 lite_regex = re.compile(r'^GEO-\d{3}LITE')
@@ -86,7 +88,7 @@ class GeoIP(object):
         if not path:
             path = GEOIP_SETTINGS.get('GEOIP_PATH', None)
             if not path: raise GeoIPException('GeoIP path must be provided via parameter or the GEOIP_PATH setting.')
-        if not isinstance(path, basestring):
+        if not isinstance(path, six.string_types):
             raise TypeError('Invalid path type: %s' % type(path).__name__)
 
         if os.path.isdir(path):
@@ -129,7 +131,7 @@ class GeoIP(object):
     def _check_query(self, query, country=False, city=False, city_or_country=False):
         "Helper routine for checking the query and database availability."
         # Making sure a string was passed in for the query.
-        if not isinstance(query, basestring):
+        if not isinstance(query, six.string_types):
             raise TypeError('GeoIP query must be a string, not type %s' % type(query).__name__)
 
         # GeoIP only takes ASCII-encoded strings.

django/contrib/gis/geoip/tests.py

@@ -6,6 +6,8 @@ from django.contrib.gis.geos import GEOSGeometry
 from django.contrib.gis.geoip import GeoIP, GeoIPException
 from django.utils import unittest
 
+from django.utils import six
+
 # Note: Requires use of both the GeoIP country and city datasets.
 # The GEOIP_DATA path should be the only setting set (the directory
 # should contain links or the actual database files 'GeoIP.dat' and
@@ -35,7 +37,7 @@ class GeoIPTest(unittest.TestCase):
         bad_params = (23, 'foo', 15.23)
         for bad in bad_params:
             self.assertRaises(GeoIPException, GeoIP, cache=bad)
-            if isinstance(bad, basestring):
+            if isinstance(bad, six.string_types):
                 e = GeoIPException
             else:
                 e = TypeError

django/contrib/gis/geos/factory.py

@@ -1,12 +1,14 @@
 from django.contrib.gis.geos.geometry import GEOSGeometry, wkt_regex, hex_regex
 
+from django.utils import six
+
 def fromfile(file_h):
     """
     Given a string file name, returns a GEOSGeometry. The file may contain WKB,
     WKT, or HEX.
     """
     # If given a file name, get a real handle.
-    if isinstance(file_h, basestring): 
+    if isinstance(file_h, six.string_types):
         with open(file_h, 'rb') as file_h:
             buf = file_h.read()
     else:

django/contrib/gis/geos/geometry.py

@@ -27,6 +27,8 @@ from django.contrib.gis.geos.prototypes.io import wkt_r, wkt_w, wkb_r, wkb_w, ew
 # For recognizing geometry input.
 from django.contrib.gis.geometry.regex import hex_regex, wkt_regex, json_regex
 
+from django.utils import six
+
 class GEOSGeometry(GEOSBase, ListMixin):
     "A class that, generally, encapsulates a GEOS geometry."
 
@@ -52,7 +54,7 @@ class GEOSGeometry(GEOSBase, ListMixin):
         The `srid` keyword is used to specify the Source Reference Identifier
         (SRID) number for this Geometry.  If not set, the SRID will be None.
         """
-        if isinstance(geo_input, basestring):
+        if isinstance(geo_input, six.string_types):
             if isinstance(geo_input, unicode):
                 # Encoding to ASCII, WKT or HEXEWKB doesn't need any more.
                 geo_input = geo_input.encode('ascii')
@@ -153,7 +155,7 @@ class GEOSGeometry(GEOSBase, ListMixin):
         Equivalence testing, a Geometry may be compared with another Geometry
         or a WKT representation.
         """
-        if isinstance(other, basestring):
+        if isinstance(other, six.string_types):
             return self.wkt == other
         elif isinstance(other, GEOSGeometry):
             return self.equals_exact(other)
@@ -333,7 +335,7 @@ class GEOSGeometry(GEOSBase, ListMixin):
         Returns true if the elements in the DE-9IM intersection matrix for the
         two Geometries match the elements in pattern.
         """
-        if not isinstance(pattern, basestring) or len(pattern) > 9:
+        if not isinstance(pattern, six.string_types) or len(pattern) > 9:
             raise GEOSException('invalid intersection matrix pattern')
         return capi.geos_relatepattern(self.ptr, other.ptr, pattern)
 

django/contrib/gis/geos/prototypes/io.py

@@ -6,6 +6,8 @@ from django.contrib.gis.geos.prototypes.errcheck import check_geom, check_string
 from django.contrib.gis.geos.prototypes.geom import c_uchar_p, geos_char_p
 from django.contrib.gis.geos.prototypes.threadsafe import GEOSFunc
 
+from django.utils import six
+
 ### The WKB/WKT Reader/Writer structures and pointers ###
 class WKTReader_st(Structure): pass
 class WKTWriter_st(Structure): pass
@@ -118,7 +120,7 @@ class _WKTReader(IOBase):
     ptr_type = WKT_READ_PTR
 
     def read(self, wkt):
-        if not isinstance(wkt, basestring): raise TypeError
+        if not isinstance(wkt, six.string_types): raise TypeError
         return wkt_reader_read(self.ptr, wkt)
 
 class _WKBReader(IOBase):
@@ -131,7 +133,7 @@ class _WKBReader(IOBase):
         if isinstance(wkb, buffer):
             wkb_s = str(wkb)
             return wkb_reader_read(self.ptr, wkb_s, len(wkb_s))
-        elif isinstance(wkb, basestring):
+        elif isinstance(wkb, six.string_types):
             return wkb_reader_read_hex(self.ptr, wkb, len(wkb))
         else:
             raise TypeError
@@ -195,7 +197,7 @@ class WKBWriter(IOBase):
 # `ThreadLocalIO` object holds instances of the WKT and WKB reader/writer
 # objects that are local to the thread.  The `GEOSGeometry` internals
 # access these instances by calling the module-level functions, defined
-# below. 
+# below.
 class ThreadLocalIO(threading.local):
     wkt_r = None
     wkt_w = None

django/contrib/gis/geos/tests/test_geos.py

@@ -8,6 +8,7 @@ from django.contrib.gis.geos.base import gdal, numpy, GEOSBase
 from django.contrib.gis.geos.libgeos import GEOS_PREPARE
 from django.contrib.gis.geometry.test_data import TestDataMixin
 
+from django.utils import six
 from django.utils import unittest
 
 
@@ -1004,7 +1005,7 @@ class GEOSTest(unittest.TestCase, TestDataMixin):
 
         g = GEOSGeometry("POINT(0 0)")
         self.assertTrue(g.valid)
-        self.assertTrue(isinstance(g.valid_reason, basestring))
+        self.assertTrue(isinstance(g.valid_reason, six.string_types))
         self.assertEqual(g.valid_reason, "Valid Geometry")
 
         print("\nBEGIN - expecting GEOS_NOTICE; safe to ignore.\n")
@@ -1012,7 +1013,7 @@ class GEOSTest(unittest.TestCase, TestDataMixin):
         g = GEOSGeometry("LINESTRING(0 0, 0 0)")
 
         self.assertTrue(not g.valid)
-        self.assertTrue(isinstance(g.valid_reason, basestring))
+        self.assertTrue(isinstance(g.valid_reason, six.string_types))
         self.assertTrue(g.valid_reason.startswith("Too few points in geometry component"))
 
         print("\nEND - expecting GEOS_NOTICE; safe to ignore.\n")

django/contrib/gis/geos/tests/test_io.py

@@ -1,6 +1,7 @@
 import binascii
 import unittest
 from django.contrib.gis.geos import GEOSGeometry, WKTReader, WKTWriter, WKBReader, WKBWriter, geos_version_info
+from django.utils import six
 
 class GEOSIOTest(unittest.TestCase):
 
@@ -17,7 +18,7 @@ class GEOSIOTest(unittest.TestCase):
         for geom in (g1, g2):
             self.assertEqual(ref, geom)
 
-        # Should only accept basestring objects.
+        # Should only accept six.string_types objects.
         self.assertRaises(TypeError, wkt_r.read, 1)
         self.assertRaises(TypeError, wkt_r.read, buffer('foo'))
 
@@ -48,7 +49,7 @@ class GEOSIOTest(unittest.TestCase):
         bad_input = (1, 5.23, None, False)
         for bad_wkb in bad_input:
             self.assertRaises(TypeError, wkb_r.read, bad_wkb)
-        
+
     def test04_wkbwriter(self):
         wkb_w = WKBWriter()
 
@@ -67,7 +68,7 @@ class GEOSIOTest(unittest.TestCase):
         for bad_byteorder in (-1, 2, 523, 'foo', None):
             # Equivalent of `wkb_w.byteorder = bad_byteorder`
             self.assertRaises(ValueError, wkb_w._set_byteorder, bad_byteorder)
-            
+
         # Setting the byteorder to 0 (for Big Endian)
         wkb_w.byteorder = 0
         self.assertEqual(hex2, wkb_w.write_hex(g))
@@ -79,7 +80,7 @@ class GEOSIOTest(unittest.TestCase):
         # Now, trying out the 3D and SRID flags.
         g = GEOSGeometry('POINT (5 23 17)')
         g.srid = 4326
-        
+
         hex3d = '0101000080000000000000144000000000000037400000000000003140'
         wkb3d = buffer(binascii.a2b_hex(hex3d))
         hex3d_srid = '01010000A0E6100000000000000000144000000000000037400000000000003140'

django/contrib/gis/maps/google/overlays.py

@@ -1,6 +1,7 @@
 from django.contrib.gis.geos import fromstr, Point, LineString, LinearRing, Polygon
 from django.utils.functional import total_ordering
 from django.utils.safestring import mark_safe
+from django.utils import six
 
 
 class GEvent(object):
@@ -98,7 +99,7 @@ class GPolygon(GOverlayBase):
           fill_opacity:
             The opacity of the polygon fill.  Defaults to 0.4.
         """
-        if isinstance(poly, basestring): poly = fromstr(poly)
+        if isinstance(poly, six.string_types): poly = fromstr(poly)
         if isinstance(poly, (tuple, list)): poly = Polygon(poly)
         if not isinstance(poly, Polygon):
             raise TypeError('GPolygon may only initialize on GEOS Polygons.')
@@ -148,7 +149,7 @@ class GPolyline(GOverlayBase):
             The opacity of the polyline, between 0 and 1.  Defaults to 1.
         """
         # If a GEOS geometry isn't passed in, try to contsruct one.
-        if isinstance(geom, basestring): geom = fromstr(geom)
+        if isinstance(geom, six.string_types): geom = fromstr(geom)
         if isinstance(geom, (tuple, list)): geom = Polygon(geom)
         # Generating the lat/lng coordinate pairs.
         if isinstance(geom, (LineString, LinearRing)):
@@ -239,9 +240,9 @@ class GIcon(object):
 
     def __lt__(self, other):
         return self.varname < other.varname
-    
+
     def __hash__(self):
-        # XOR with hash of GIcon type so that hash('varname') won't 
+        # XOR with hash of GIcon type so that hash('varname') won't
         # equal hash(GIcon('varname')).
         return hash(self.__class__) ^ hash(self.varname)
 
@@ -278,7 +279,7 @@ class GMarker(GOverlayBase):
            Draggable option for GMarker, disabled by default.
         """
         # If a GEOS geometry isn't passed in, try to construct one.
-        if isinstance(geom, basestring): geom = fromstr(geom)
+        if isinstance(geom, six.string_types): geom = fromstr(geom)
         if isinstance(geom, (tuple, list)): geom = Point(geom)
         if isinstance(geom, Point):
             self.latlng = self.latlng_from_coords(geom.coords)

django/contrib/gis/measure.py

@@ -58,7 +58,7 @@ class MeasureBase(object):
     def __init__(self, default_unit=None, **kwargs):
         value, self._default_unit = self.default_units(kwargs)
         setattr(self, self.STANDARD_UNIT, value)
-        if default_unit and isinstance(default_unit, basestring):
+        if default_unit and isinstance(default_unit, six.string_types):
             self._default_unit = default_unit
 
     def _get_standard(self):

django/contrib/gis/utils/layermapping.py

@@ -17,6 +17,7 @@ from django.contrib.gis.gdal.field import (
     OFTDate, OFTDateTime, OFTInteger, OFTReal, OFTString, OFTTime)
 from django.db import models, transaction
 from django.contrib.localflavor.us.models import USStateField
+from django.utils import six
 
 # LayerMapping exceptions.
 class LayerMapError(Exception): pass
@@ -74,7 +75,7 @@ class LayerMapping(object):
         argument usage.
         """
         # Getting the DataSource and the associated Layer.
-        if isinstance(data, basestring):
+        if isinstance(data, six.string_types):
             self.ds = DataSource(data)
         else:
             self.ds = data
@@ -249,7 +250,7 @@ class LayerMapping(object):
             sr = source_srs
         elif isinstance(source_srs, self.spatial_backend.spatial_ref_sys()):
             sr = source_srs.srs
-        elif isinstance(source_srs, (int, basestring)):
+        elif isinstance(source_srs, (int, six.string_types)):
             sr = SpatialReference(source_srs)
         else:
             # Otherwise just pulling the SpatialReference from the layer
@@ -266,7 +267,7 @@ class LayerMapping(object):
             # List of fields to determine uniqueness with
             for attr in unique:
                 if not attr in self.mapping: raise ValueError
-        elif isinstance(unique, basestring):
+        elif isinstance(unique, six.string_types):
             # Only a single field passed in.
             if unique not in self.mapping: raise ValueError
         else:
@@ -312,7 +313,7 @@ class LayerMapping(object):
         will construct and return the uniqueness keyword arguments -- a subset
         of the feature kwargs.
         """
-        if isinstance(self.unique, basestring):
+        if isinstance(self.unique, six.string_types):
             return {self.unique : kwargs[self.unique]}
         else:
             return dict((fld, kwargs[fld]) for fld in self.unique)

django/contrib/gis/utils/ogrinspect.py

@@ -9,6 +9,7 @@ from future_builtins import zip
 # Requires GDAL to use.
 from django.contrib.gis.gdal import DataSource
 from django.contrib.gis.gdal.field import OFTDate, OFTDateTime, OFTInteger, OFTReal, OFTString, OFTTime
+from django.utils import six
 
 def mapping(data_source, geom_name='geom', layer_key=0, multi_geom=False):
     """
@@ -24,7 +25,7 @@ def mapping(data_source, geom_name='geom', layer_key=0, multi_geom=False):
 
      `multi_geom` => Boolean (default: False) - specify as multigeometry.
     """
-    if isinstance(data_source, basestring):
+    if isinstance(data_source, six.string_types):
         # Instantiating the DataSource from the string.
         data_source = DataSource(data_source)
     elif isinstance(data_source, DataSource):

django/contrib/gis/utils/wkt.py

@@ -2,9 +2,11 @@
  Utilities for manipulating Geometry WKT.
 """
 
+from django.utils import six
+
 def precision_wkt(geom, prec):
     """
-    Returns WKT text of the geometry according to the given precision (an 
+    Returns WKT text of the geometry according to the given precision (an
     integer or a string).  If the precision is an integer, then the decimal
     places of coordinates WKT will be truncated to that number:
 
@@ -14,12 +16,12 @@ def precision_wkt(geom, prec):
      >>> precision(geom, 1)
      'POINT (5.0 23.0)'
 
-    If the precision is a string, it must be valid Python format string 
+    If the precision is a string, it must be valid Python format string
     (e.g., '%20.7f') -- thus, you should know what you're doing.
     """
     if isinstance(prec, int):
         num_fmt = '%%.%df' % prec
-    elif isinstance(prec, basestring):
+    elif isinstance(prec, six.string_types):
         num_fmt = prec
     else:
         raise TypeError

django/core/cache/backends/memcached.py

@@ -5,10 +5,12 @@ from threading import local
 
 from django.core.cache.backends.base import BaseCache, InvalidCacheBackendError
 
+from django.utils import six
+
 class BaseMemcachedCache(BaseCache):
     def __init__(self, server, params, library, value_not_found_exception):
         super(BaseMemcachedCache, self).__init__(params)
-        if isinstance(server, basestring):
+        if isinstance(server, six.string_types):
             self._servers = server.split(';')
         else:
             self._servers = server

django/core/mail/backends/filebased.py

@@ -6,6 +6,7 @@ import os
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
 from django.core.mail.backends.console import EmailBackend as ConsoleEmailBackend
+from django.utils import six
 
 class EmailBackend(ConsoleEmailBackend):
     def __init__(self, *args, **kwargs):
@@ -15,7 +16,7 @@ class EmailBackend(ConsoleEmailBackend):
         else:
             self.file_path = getattr(settings, 'EMAIL_FILE_PATH',None)
         # Make sure self.file_path is a string.
-        if not isinstance(self.file_path, basestring):
+        if not isinstance(self.file_path, six.string_types):
             raise ImproperlyConfigured('Path for saving emails is invalid: %r' % self.file_path)
         self.file_path = os.path.abspath(self.file_path)
         # Make sure that self.file_path is an directory if it exists.

django/core/mail/message.py

@@ -16,6 +16,7 @@ from io import BytesIO
 from django.conf import settings
 from django.core.mail.utils import DNS_NAME
 from django.utils.encoding import smart_str, force_unicode
+from django.utils import six
 
 
 # Don't BASE64-encode UTF-8 messages so that we avoid unwanted attention from
@@ -96,7 +97,7 @@ def forbid_multi_line_headers(name, val, encoding):
 
 
 def sanitize_address(addr, encoding):
-    if isinstance(addr, basestring):
+    if isinstance(addr, six.string_types):
         addr = parseaddr(force_unicode(addr))
     nm, addr = addr
     nm = str(Header(nm, encoding))
@@ -180,17 +181,17 @@ class EmailMessage(object):
         necessary encoding conversions.
         """
         if to:
-            assert not isinstance(to, basestring), '"to" argument must be a list or tuple'
+            assert not isinstance(to, six.string_types), '"to" argument must be a list or tuple'
             self.to = list(to)
         else:
             self.to = []
         if cc:
-            assert not isinstance(cc, basestring), '"cc" argument must be a list or tuple'
+            assert not isinstance(cc, six.string_types), '"cc" argument must be a list or tuple'
             self.cc = list(cc)
         else:
             self.cc = []
         if bcc:
-            assert not isinstance(bcc, basestring), '"bcc" argument must be a list or tuple'
+            assert not isinstance(bcc, six.string_types), '"bcc" argument must be a list or tuple'
             self.bcc = list(bcc)
         else:
             self.bcc = []

django/core/management/validation.py

@@ -3,6 +3,7 @@ import sys
 from django.core.management.color import color_style
 from django.utils.encoding import smart_str
 from django.utils.itercompat import is_iterable
+from django.utils import six
 
 class ModelErrorCollection:
     def __init__(self, outfile=sys.stdout):
@@ -93,7 +94,7 @@ def get_validation_errors(outfile, app=None):
             if isinstance(f, models.FilePathField) and not (f.allow_files or f.allow_folders):
                 e.add(opts, '"%s": FilePathFields must have either allow_files or allow_folders set to True.' % f.name)
             if f.choices:
-                if isinstance(f.choices, basestring) or not is_iterable(f.choices):
+                if isinstance(f.choices, six.string_types) or not is_iterable(f.choices):
                     e.add(opts, '"%s": "choices" should be iterable (e.g., a tuple or list).' % f.name)
                 else:
                     for c in f.choices:
@@ -168,7 +169,7 @@ def get_validation_errors(outfile, app=None):
             if f.unique:
                 e.add(opts, "ManyToManyFields cannot be unique.  Remove the unique argument on '%s'." % f.name)
 
-            if f.rel.through is not None and not isinstance(f.rel.through, basestring):
+            if f.rel.through is not None and not isinstance(f.rel.through, six.string_types):
                 from_model, to_model = cls, f.rel.to
                 if from_model == to_model and f.rel.symmetrical and not f.rel.through._meta.auto_created:
                     e.add(opts, "Many-to-many fields with intermediate tables cannot be symmetrical.")
@@ -239,7 +240,7 @@ def get_validation_errors(outfile, app=None):
                             "to %s and %s" % (f.name, f.rel.through._meta.object_name,
                                 f.rel.to._meta.object_name, cls._meta.object_name)
                         )
-            elif isinstance(f.rel.through, basestring):
+            elif isinstance(f.rel.through, six.string_types):
                 e.add(opts, "'%s' specifies an m2m relation through model %s, "
                     "which has not been installed" % (f.name, f.rel.through)
                 )

django/core/serializers/base.py

@@ -6,6 +6,7 @@ from io import BytesIO
 
 from django.db import models
 from django.utils.encoding import smart_unicode
+from django.utils import six
 
 class SerializerDoesNotExist(KeyError):
     """The requested serializer was not found."""
@@ -123,7 +124,7 @@ class Deserializer(object):
         Init this serializer given a stream or a string
         """
         self.options = options
-        if isinstance(stream_or_string, basestring):
+        if isinstance(stream_or_string, six.string_types):
             self.stream = BytesIO(stream_or_string)
         else:
             self.stream = stream_or_string

django/core/serializers/json.py

@@ -13,6 +13,7 @@ from django.core.serializers.base import DeserializationError
 from django.core.serializers.python import Serializer as PythonSerializer
 from django.core.serializers.python import Deserializer as PythonDeserializer
 from django.utils.encoding import smart_str
+from django.utils import six
 from django.utils.timezone import is_aware
 
 class Serializer(PythonSerializer):
@@ -63,7 +64,7 @@ def Deserializer(stream_or_string, **options):
     if isinstance(stream_or_string, bytes):
         stream_or_string = stream_or_string.decode('utf-8')
     try:
-        if isinstance(stream_or_string, basestring):
+        if isinstance(stream_or_string, six.string_types):
             objects = json.loads(stream_or_string)
         else:
             objects = json.load(stream_or_string)

django/core/serializers/pyyaml.py

@@ -13,6 +13,7 @@ from django.core.serializers.base import DeserializationError
 from django.core.serializers.python import Serializer as PythonSerializer
 from django.core.serializers.python import Deserializer as PythonDeserializer
 from django.utils.encoding import smart_str
+from django.utils import six
 
 
 class DjangoSafeDumper(yaml.SafeDumper):
@@ -53,7 +54,7 @@ def Deserializer(stream_or_string, **options):
     """
     if isinstance(stream_or_string, bytes):
         stream_or_string = stream_or_string.decode('utf-8')
-    if isinstance(stream_or_string, basestring):
+    if isinstance(stream_or_string, six.string_types):
         stream = StringIO(stream_or_string)
     else:
         stream = stream_or_string

django/core/urlresolvers.py

@@ -19,6 +19,7 @@ from django.utils.functional import memoize, lazy
 from django.utils.importlib import import_module
 from django.utils.module_loading import module_has_submodule
 from django.utils.regex_helper import normalize
+from django.utils import six
 from django.utils.translation import get_language
 
 
@@ -159,7 +160,7 @@ class LocaleRegexProvider(object):
         """
         language_code = get_language()
         if language_code not in self._regex_dict:
-            if isinstance(self._regex, basestring):
+            if isinstance(self._regex, six.string_types):
                 regex = self._regex
             else:
                 regex = force_unicode(self._regex)
@@ -228,7 +229,7 @@ class RegexURLResolver(LocaleRegexProvider):
         LocaleRegexProvider.__init__(self, regex)
         # urlconf_name is a string representing the module containing URLconfs.
         self.urlconf_name = urlconf_name
-        if not isinstance(urlconf_name, basestring):
+        if not isinstance(urlconf_name, six.string_types):
             self._urlconf_module = self.urlconf_name
         self.callback = None
         self.default_kwargs = default_kwargs or {}
@@ -434,7 +435,7 @@ def reverse(viewname, urlconf=None, args=None, kwargs=None, prefix=None, current
     if prefix is None:
         prefix = get_script_prefix()
 
-    if not isinstance(viewname, basestring):
+    if not isinstance(viewname, six.string_types):
         view = viewname
     else:
         parts = viewname.split(':')

django/core/validators.py

@@ -7,6 +7,7 @@ from django.core.exceptions import ValidationError
 from django.utils.translation import ugettext_lazy as _
 from django.utils.encoding import smart_unicode
 from django.utils.ipv6 import is_valid_ipv6_address
+from django.utils import six
 
 # These values, if given to validate(), will trigger the self.required check.
 EMPTY_VALUES = (None, '', [], (), {})
@@ -25,7 +26,7 @@ class RegexValidator(object):
             self.code = code
 
         # Compile the regex if it was not passed pre-compiled.
-        if isinstance(self.regex, basestring):
+        if isinstance(self.regex, six.string_types):
             self.regex = re.compile(self.regex)
 
     def __call__(self, value):

django/db/backends/oracle/base.py

@@ -10,6 +10,7 @@ import decimal
 import sys
 import warnings
 
+from django.utils import six
 
 def _setup_environment(environ):
     import platform
@@ -361,7 +362,7 @@ WHEN (new.%(col_name)s IS NULL)
         if value is None:
             return None
 
-        if isinstance(value, basestring):
+        if isinstance(value, six.string_types):
             return datetime.datetime.strptime(value, '%H:%M:%S')
 
         # Oracle doesn't support tz-aware times
@@ -596,7 +597,7 @@ class OracleParam(object):
         if hasattr(param, 'input_size'):
             # If parameter has `input_size` attribute, use that.
             self.input_size = param.input_size
-        elif isinstance(param, basestring) and len(param) > 4000:
+        elif isinstance(param, six.string_types) and len(param) > 4000:
             # Mark any string param greater than 4000 characters as a CLOB.
             self.input_size = Database.CLOB
         else:
@@ -824,7 +825,7 @@ def to_unicode(s):
     Convert strings to Unicode objects (and return all other data types
     unchanged).
     """
-    if isinstance(s, basestring):
+    if isinstance(s, six.string_types):
         return force_unicode(s)
     return s
 

django/db/models/fields/__init__.py

@@ -21,6 +21,7 @@ from django.utils import timezone
 from django.utils.translation import ugettext_lazy as _
 from django.utils.encoding import smart_unicode, force_unicode
 from django.utils.ipv6 import clean_ipv6_address
+from django.utils import six
 
 class NOT_PROVIDED:
     pass
@@ -625,7 +626,7 @@ class CharField(Field):
         return "CharField"
 
     def to_python(self, value):
-        if isinstance(value, basestring) or value is None:
+        if isinstance(value, six.string_types) or value is None:
             return value
         return smart_unicode(value)
 
@@ -864,7 +865,7 @@ class DecimalField(Field):
             raise exceptions.ValidationError(msg)
 
     def _format(self, value):
-        if isinstance(value, basestring) or value is None:
+        if isinstance(value, six.string_types) or value is None:
             return value
         else:
             return self.format_number(value)
@@ -1185,7 +1186,7 @@ class TextField(Field):
         return "TextField"
 
     def get_prep_value(self, value):
-        if isinstance(value, basestring) or value is None:
+        if isinstance(value, six.string_types) or value is None:
             return value
         return smart_unicode(value)
 

django/db/models/fields/files.py

@@ -9,6 +9,7 @@ from django.core.files.storage import default_storage
 from django.core.files.images import ImageFile
 from django.db.models import signals
 from django.utils.encoding import force_unicode, smart_str
+from django.utils import six
 from django.utils.translation import ugettext_lazy as _
 
 class FieldFile(File):
@@ -176,7 +177,7 @@ class FileDescriptor(object):
         # subclasses might also want to subclass the attribute class]. This
         # object understands how to convert a path to a file, and also how to
         # handle None.
-        if isinstance(file, basestring) or file is None:
+        if isinstance(file, six.string_types) or file is None:
             attr = self.field.attr_class(instance, self.field, file)
             instance.__dict__[self.field.name] = attr
 

django/db/models/fields/related.py

@@ -10,6 +10,7 @@ from django.db.models.query import QuerySet
 from django.db.models.query_utils import QueryWrapper
 from django.db.models.deletion import CASCADE
 from django.utils.encoding import smart_unicode
+from django.utils import six
 from django.utils.translation import ugettext_lazy as _, string_concat
 from django.utils.functional import curry, cached_property
 from django.core import exceptions
@@ -104,7 +105,7 @@ class RelatedField(object):
                 }
 
         other = self.rel.to
-        if isinstance(other, basestring) or other._meta.pk is None:
+        if isinstance(other, six.string_types) or other._meta.pk is None:
             def resolve_related_class(field, model, cls):
                 field.rel.to = model
                 field.do_related_class(model, cls)
@@ -865,7 +866,7 @@ class ManyToOneRel(object):
         try:
             to._meta
         except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT
-            assert isinstance(to, basestring), "'to' must be either a model, a model name or the string %r" % RECURSIVE_RELATIONSHIP_CONSTANT
+            assert isinstance(to, six.string_types), "'to' must be either a model, a model name or the string %r" % RECURSIVE_RELATIONSHIP_CONSTANT
         self.to, self.field_name = to, field_name
         self.related_name = related_name
         if limit_choices_to is None:
@@ -933,7 +934,7 @@ class ForeignKey(RelatedField, Field):
         try:
             to_name = to._meta.object_name.lower()
         except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT
-            assert isinstance(to, basestring), "%s(%r) is invalid. First parameter to ForeignKey must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT)
+            assert isinstance(to, six.string_types), "%s(%r) is invalid. First parameter to ForeignKey must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT)
         else:
             assert not to._meta.abstract, "%s cannot define a relation with abstract class %s" % (self.__class__.__name__, to._meta.object_name)
             # For backwards compatibility purposes, we need to *try* and set
@@ -1004,7 +1005,7 @@ class ForeignKey(RelatedField, Field):
     def contribute_to_class(self, cls, name):
         super(ForeignKey, self).contribute_to_class(cls, name)
         setattr(cls, self.name, ReverseSingleRelatedObjectDescriptor(self))
-        if isinstance(self.rel.to, basestring):
+        if isinstance(self.rel.to, six.string_types):
             target = self.rel.to
         else:
             target = self.rel.to._meta.db_table
@@ -1022,7 +1023,7 @@ class ForeignKey(RelatedField, Field):
 
     def formfield(self, **kwargs):
         db = kwargs.pop('using', None)
-        if isinstance(self.rel.to, basestring):
+        if isinstance(self.rel.to, six.string_types):
             raise ValueError("Cannot create form field for %r yet, because "
                              "its related model %r has not been loaded yet" %
                              (self.name, self.rel.to))
@@ -1079,13 +1080,13 @@ class OneToOneField(ForeignKey):
 def create_many_to_many_intermediary_model(field, klass):
     from django.db import models
     managed = True
-    if isinstance(field.rel.to, basestring) and field.rel.to != RECURSIVE_RELATIONSHIP_CONSTANT:
+    if isinstance(field.rel.to, six.string_types) and field.rel.to != RECURSIVE_RELATIONSHIP_CONSTANT:
         to_model = field.rel.to
         to = to_model.split('.')[-1]
         def set_managed(field, model, cls):
             field.rel.through._meta.managed = model._meta.managed or cls._meta.managed
         add_lazy_relation(klass, field, to_model, set_managed)
-    elif isinstance(field.rel.to, basestring):
+    elif isinstance(field.rel.to, six.string_types):
         to = klass._meta.object_name
         to_model = klass
         managed = klass._meta.managed
@@ -1124,7 +1125,7 @@ class ManyToManyField(RelatedField, Field):
         try:
             assert not to._meta.abstract, "%s cannot define a relation with abstract class %s" % (self.__class__.__name__, to._meta.object_name)
         except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT
-            assert isinstance(to, basestring), "%s(%r) is invalid. First parameter to ManyToManyField must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT)
+            assert isinstance(to, six.string_types), "%s(%r) is invalid. First parameter to ManyToManyField must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT)
             # Python 2.6 and earlier require dictionary keys to be of str type,
             # not unicode and class names must be ASCII (in Python 2.x), so we
             # forcibly coerce it here (breaks early if there's a problem).
@@ -1232,12 +1233,12 @@ class ManyToManyField(RelatedField, Field):
 
         # Populate some necessary rel arguments so that cross-app relations
         # work correctly.
-        if isinstance(self.rel.through, basestring):
+        if isinstance(self.rel.through, six.string_types):
             def resolve_through_model(field, model, cls):
                 field.rel.through = model
             add_lazy_relation(cls, self, self.rel.through, resolve_through_model)
 
-        if isinstance(self.rel.to, basestring):
+        if isinstance(self.rel.to, six.string_types):
             target = self.rel.to
         else:
             target = self.rel.to._meta.db_table

django/db/models/options.py

@@ -10,6 +10,7 @@ from django.db.models.loading import get_models, app_cache_ready
 from django.utils.translation import activate, deactivate_all, get_language, string_concat
 from django.utils.encoding import force_unicode, smart_str
 from django.utils.datastructures import SortedDict
+from django.utils import six
 
 # Calculate the verbose_name by converting from InitialCaps to "lowercase with spaces".
 get_verbose_name = lambda class_name: re.sub('(((?<=[a-z])[A-Z])|([A-Z](?![A-Z]|$)))', ' \\1', class_name).lower().strip()
@@ -400,7 +401,7 @@ class Options(object):
         proxy_cache = cache.copy()
         for klass in get_models(include_auto_created=True, only_installed=False):
             for f in klass._meta.local_fields:
-                if f.rel and not isinstance(f.rel.to, basestring):
+                if f.rel and not isinstance(f.rel.to, six.string_types):
                     if self == f.rel.to._meta:
                         cache[RelatedObject(f.rel.to, klass, f)] = None
                         proxy_cache[RelatedObject(f.rel.to, klass, f)] = None
@@ -442,7 +443,7 @@ class Options(object):
                     cache[obj] = model
         for klass in get_models(only_installed=False):
             for f in klass._meta.local_many_to_many:
-                if f.rel and not isinstance(f.rel.to, basestring) and self == f.rel.to._meta:
+                if f.rel and not isinstance(f.rel.to, six.string_types) and self == f.rel.to._meta:
                     cache[RelatedObject(f.rel.to, klass, f)] = None
         if app_cache_ready():
             self._related_many_to_many_cache = cache

django/db/utils.py

@@ -4,6 +4,7 @@ from threading import local
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
 from django.utils.importlib import import_module
+from django.utils import six
 
 
 DEFAULT_DB_ALIAS = 'default'
@@ -108,7 +109,7 @@ class ConnectionRouter(object):
     def __init__(self, routers):
         self.routers = []
         for r in routers:
-            if isinstance(r, basestring):
+            if isinstance(r, six.string_types):
                 try:
                     module_name, klass_name = r.rsplit('.', 1)
                     module = import_module(module_name)

django/forms/extras/widgets.py

@@ -11,6 +11,7 @@ from django.utils import datetime_safe
 from django.utils.dates import MONTHS
 from django.utils.safestring import mark_safe
 from django.utils.formats import get_format
+from django.utils import six
 from django.conf import settings
 
 __all__ = ('SelectDateWidget',)
@@ -64,7 +65,7 @@ class SelectDateWidget(Widget):
             year_val, month_val, day_val = value.year, value.month, value.day
         except AttributeError:
             year_val = month_val = day_val = None
-            if isinstance(value, basestring):
+            if isinstance(value, six.string_types):
                 if settings.USE_L10N:
                     try:
                         input_format = get_format('DATE_INPUT_FORMATS')[0]

django/forms/fields.py

@@ -22,6 +22,7 @@ from django.forms.widgets import (TextInput, PasswordInput, HiddenInput,
 from django.utils import formats
 from django.utils.encoding import smart_unicode, force_unicode
 from django.utils.ipv6 import clean_ipv6_address
+from django.utils import six
 from django.utils.translation import ugettext_lazy as _
 
 # Provide this import for backwards compatibility.
@@ -445,7 +446,7 @@ class RegexField(CharField):
         return self._regex
 
     def _set_regex(self, regex):
-        if isinstance(regex, basestring):
+        if isinstance(regex, six.string_types):
             regex = re.compile(regex, re.UNICODE)
         self._regex = regex
         if hasattr(self, '_regex_validator') and self._regex_validator in self.validators:
@@ -633,7 +634,7 @@ class BooleanField(Field):
         # will submit for False. Also check for '0', since this is what
         # RadioSelect will provide. Because bool("True") == bool('1') == True,
         # we don't need to handle that explicitly.
-        if isinstance(value, basestring) and value.lower() in ('false', '0'):
+        if isinstance(value, six.string_types) and value.lower() in ('false', '0'):
             value = False
         else:
             value = bool(value)

django/forms/widgets.py

@@ -16,6 +16,7 @@ from django.utils.html import conditional_escape, format_html, format_html_join
 from django.utils.translation import ugettext, ugettext_lazy
 from django.utils.encoding import StrAndUnicode, force_unicode
 from django.utils.safestring import mark_safe
+from django.utils import six
 from django.utils import datetime_safe, formats
 from django.utils import six
 
@@ -522,7 +523,7 @@ class CheckboxInput(Widget):
         value = data.get(name)
         # Translate true and false strings to boolean values.
         values =  {'true': True, 'false': False}
-        if isinstance(value, basestring):
+        if isinstance(value, six.string_types):
             value = values.get(value.lower(), value)
         return value
 

django/template/base.py

@@ -18,6 +18,7 @@ from django.utils.safestring import (SafeData, EscapeData, mark_safe,
 from django.utils.formats import localize
 from django.utils.html import escape
 from django.utils.module_loading import module_has_submodule
+from django.utils import six
 from django.utils.timezone import template_localtime
 
 
@@ -1188,7 +1189,7 @@ class Library(object):
                         from django.template.loader import get_template, select_template
                         if isinstance(file_name, Template):
                             t = file_name
-                        elif not isinstance(file_name, basestring) and is_iterable(file_name):
+                        elif not isinstance(file_name, six.string_types) and is_iterable(file_name):
                             t = select_template(file_name)
                         else:
                             t = get_template(file_name)

django/template/loader.py

@@ -29,6 +29,7 @@ from django.core.exceptions import ImproperlyConfigured
 from django.template.base import Origin, Template, Context, TemplateDoesNotExist, add_to_builtins
 from django.utils.importlib import import_module
 from django.conf import settings
+from django.utils import six
 
 template_source_loaders = None
 
@@ -89,7 +90,7 @@ def find_template_loader(loader):
         loader, args = loader[0], loader[1:]
     else:
         args = []
-    if isinstance(loader, basestring):
+    if isinstance(loader, six.string_types):
         module, attr = loader.rsplit('.', 1)
         try:
             mod = import_module(module)

django/template/response.py

@@ -1,5 +1,6 @@
 from django.http import HttpResponse
 from django.template import loader, Context, RequestContext
+from django.utils import six
 
 
 class ContentNotRenderedError(Exception):
@@ -53,7 +54,7 @@ class SimpleTemplateResponse(HttpResponse):
         "Accepts a template object, path-to-template or list of paths"
         if isinstance(template, (list, tuple)):
             return loader.select_template(template)
-        elif isinstance(template, basestring):
+        elif isinstance(template, six.string_types):
             return loader.get_template(template)
         else:
             return template

django/templatetags/i18n.py

@@ -5,6 +5,7 @@ from django.template import (Node, Variable, TemplateSyntaxError,
     TokenParser, Library, TOKEN_TEXT, TOKEN_VAR)
 from django.template.base import _render_value_in_context
 from django.template.defaulttags import token_kwargs
+from django.utils import six
 from django.utils import translation
 
 
@@ -76,7 +77,7 @@ class TranslateNode(Node):
         self.asvar = asvar
         self.message_context = message_context
         self.filter_expression = filter_expression
-        if isinstance(self.filter_expression.var, basestring):
+        if isinstance(self.filter_expression.var, six.string_types):
             self.filter_expression.var = Variable("'%s'" %
                                                   self.filter_expression.var)
 

django/templatetags/tz.py

@@ -7,6 +7,7 @@ except ImportError:
 
 from django.template import Node
 from django.template import TemplateSyntaxError, Library
+from django.utils import six
 from django.utils import timezone
 
 register = Library()
@@ -64,7 +65,7 @@ def do_timezone(value, arg):
     # Obtain a tzinfo instance
     if isinstance(arg, tzinfo):
         tz = arg
-    elif isinstance(arg, basestring) and pytz is not None:
+    elif isinstance(arg, six.string_types) and pytz is not None:
         try:
             tz = pytz.timezone(arg)
         except pytz.UnknownTimeZoneError:

django/test/_doctest.py

@@ -480,7 +480,7 @@ class DocTest:
         Create a new DocTest containing the given examples.  The
         DocTest's globals are initialized with a copy of `globs`.
         """
-        assert not isinstance(examples, basestring), \
+        assert not isinstance(examples, six.string_types), \
                "DocTest no longer accepts str; use DocTestParser instead"
         self.examples = examples
         self.docstring = docstring
@@ -906,13 +906,13 @@ class DocTestFinder:
         # Look for tests in a module's __test__ dictionary.
         if inspect.ismodule(obj) and self._recurse:
             for valname, val in getattr(obj, '__test__', {}).items():
-                if not isinstance(valname, basestring):
+                if not isinstance(valname, six.string_types):
                     raise ValueError("DocTestFinder.find: __test__ keys "
                                      "must be strings: %r" %
                                      (type(valname),))
                 if not (inspect.isfunction(val) or inspect.isclass(val) or
                         inspect.ismethod(val) or inspect.ismodule(val) or
-                        isinstance(val, basestring)):
+                        isinstance(val, six.string_types)):
                     raise ValueError("DocTestFinder.find: __test__ values "
                                      "must be strings, functions, methods, "
                                      "classes, or modules: %r" %
@@ -945,7 +945,7 @@ class DocTestFinder:
         """
         # Extract the object's docstring.  If it doesn't have one,
         # then return None (no test for this object).
-        if isinstance(obj, basestring):
+        if isinstance(obj, six.string_types):
             docstring = obj
         else:
             try:
@@ -953,7 +953,7 @@ class DocTestFinder:
                     docstring = ''
                 else:
                     docstring = obj.__doc__
-                    if not isinstance(docstring, basestring):
+                    if not isinstance(docstring, six.string_types):
                         docstring = str(docstring)
             except (TypeError, AttributeError):
                 docstring = ''

django/test/client.py

@@ -116,7 +116,7 @@ def encode_multipart(boundary, data):
     for (key, value) in data.items():
         if is_file(value):
             lines.extend(encode_file(boundary, key, value))
-        elif not isinstance(value, basestring) and is_iterable(value):
+        elif not isinstance(value, six.string_types) and is_iterable(value):
             for item in value:
                 if is_file(item):
                     lines.extend(encode_file(boundary, key, item))

django/test/html.py

@@ -8,6 +8,7 @@ import re
 from HTMLParser import HTMLParseError
 from django.utils.encoding import force_unicode
 from django.utils.html_parser import HTMLParser
+from django.utils import six
 
 
 WHITESPACE = re.compile('\s+')
@@ -24,11 +25,11 @@ class Element(object):
         self.children = []
 
     def append(self, element):
-        if isinstance(element, basestring):
+        if isinstance(element, six.string_types):
             element = force_unicode(element)
             element = normalize_whitespace(element)
             if self.children:
-                if isinstance(self.children[-1], basestring):
+                if isinstance(self.children[-1], six.string_types):
                     self.children[-1] += element
                     self.children[-1] = normalize_whitespace(self.children[-1])
                     return
@@ -36,7 +37,7 @@ class Element(object):
             # removing last children if it is only whitespace
             # this can result in incorrect dom representations since
             # whitespace between inline tags like <span> is significant
-            if isinstance(self.children[-1], basestring):
+            if isinstance(self.children[-1], six.string_types):
                 if self.children[-1].isspace():
                     self.children.pop()
         if element:
@@ -45,7 +46,7 @@ class Element(object):
     def finalize(self):
         def rstrip_last_element(children):
             if children:
-                if isinstance(children[-1], basestring):
+                if isinstance(children[-1], six.string_types):
                     children[-1] = children[-1].rstrip()
                     if not children[-1]:
                         children.pop()
@@ -54,7 +55,7 @@ class Element(object):
 
         rstrip_last_element(self.children)
         for i, child in enumerate(self.children):
-            if isinstance(child, basestring):
+            if isinstance(child, six.string_types):
                 self.children[i] = child.strip()
             elif hasattr(child, 'finalize'):
                 child.finalize()
@@ -87,15 +88,15 @@ class Element(object):
         return not self.__eq__(element)
 
     def _count(self, element, count=True):
-        if not isinstance(element, basestring):
+        if not isinstance(element, six.string_types):
             if self == element:
                 return 1
         i = 0
         for child in self.children:
             # child is text content and element is also text content, then
             # make a simple "text" in "text"
-            if isinstance(child, basestring):
+            if isinstance(child, six.string_types):
-                if isinstance(element, basestring):
+                if isinstance(element, six.string_types):
                     if count:
                         i += child.count(element)
                     elif element in child:
@@ -219,6 +220,6 @@ def parse_html(html):
     document.finalize()
     # Removing ROOT element if it's not necessary
     if len(document.children) == 1:
-        if not isinstance(document.children[0], basestring):
+        if not isinstance(document.children[0], six.string_types):
             document = document.children[0]
     return document

django/test/utils.py

@@ -6,6 +6,7 @@ from django.template import Template, loader, TemplateDoesNotExist
 from django.template.loaders import cached
 from django.utils.translation import deactivate
 from django.utils.functional import wraps
+from django.utils import six
 
 
 __all__ = (
@@ -35,7 +36,7 @@ class ContextList(list):
     in a list of context objects.
     """
     def __getitem__(self, key):
-        if isinstance(key, basestring):
+        if isinstance(key, six.string_types):
             for subcontext in self:
                 if key in subcontext:
                     return subcontext[key]

django/utils/archive.py

@@ -27,6 +27,8 @@ import sys
 import tarfile
 import zipfile
 
+from django.utils import six
+
 
 class ArchiveException(Exception):
     """
@@ -58,7 +60,7 @@ class Archive(object):
     @staticmethod
     def _archive_cls(file):
         cls = None
-        if isinstance(file, basestring):
+        if isinstance(file, six.string_types):
             filename = file
         else:
             try:

django/utils/checksums.py

@@ -4,6 +4,8 @@ Common checksum routines (used in multiple localflavor/ cases, for example).
 
 __all__ = ['luhn',]
 
+from django.utils import six
+
 LUHN_ODD_LOOKUP = (0, 2, 4, 6, 8, 1, 3, 5, 7, 9) # sum_of_digits(index * 2)
 
 def luhn(candidate):
@@ -12,7 +14,7 @@ def luhn(candidate):
     algorithm (used in validation of, for example, credit cards).
     Both numeric and string candidates are accepted.
     """
-    if not isinstance(candidate, basestring):
+    if not isinstance(candidate, six.string_types):
         candidate = str(candidate)
     try:
         evens = sum([int(c) for c in candidate[-1::-2]])

django/utils/dictconfig.py

@@ -23,6 +23,8 @@ import re
 import sys
 import types
 
+from django.utils import six
+
 IDENTIFIER = re.compile('^[a-z_][a-z0-9_]*$', re.I)
 
 def valid_ident(s):
@@ -231,7 +233,7 @@ class BaseConfigurator(object):
                  isinstance(value, tuple):
             value = ConvertingTuple(value)
             value.configurator = self
-        elif isinstance(value, basestring): # str for py3k
+        elif isinstance(value, six.string_types): # str for py3k
             m = self.CONVERT_PATTERN.match(value)
             if m:
                 d = m.groupdict()

django/utils/encoding.py

@@ -64,7 +64,7 @@ def force_unicode(s, encoding='utf-8', strings_only=False, errors='strict'):
     if strings_only and is_protected_type(s):
         return s
     try:
-        if not isinstance(s, basestring,):
+        if not isinstance(s, six.string_types,):
             if hasattr(s, '__unicode__'):
                 s = unicode(s)
             else:
@@ -109,7 +109,7 @@ def smart_str(s, encoding='utf-8', strings_only=False, errors='strict'):
         return s
     if isinstance(s, Promise):
         return unicode(s).encode(encoding, errors)
-    elif not isinstance(s, basestring):
+    elif not isinstance(s, six.string_types):
         try:
             return str(s)
         except UnicodeEncodeError:

django/utils/formats.py

@@ -178,7 +178,7 @@ def sanitize_separators(value):
     """
     if settings.USE_L10N:
         decimal_separator = get_format('DECIMAL_SEPARATOR')
-        if isinstance(value, basestring):
+        if isinstance(value, six.string_types):
             parts = []
             if decimal_separator in value:
                 value, decimals = value.split(decimal_separator, 1)

django/utils/regex_helper.py

@@ -7,6 +7,8 @@ should be good enough for a large class of URLS, however.
 """
 from __future__ import unicode_literals
 
+from django.utils import six
+
 # Mapping of an escape character to a representative of that class. So, e.g.,
 # "\w" is replaced by "x" in a reverse URL. A value of None means to ignore
 # this sequence. Any missing key is mapped to itself.
@@ -302,7 +304,7 @@ def flatten_result(source):
     result_args = [[]]
     pos = last = 0
     for pos, elt in enumerate(source):
-        if isinstance(elt, basestring):
+        if isinstance(elt, six.string_types):
             continue
         piece = ''.join(source[last:pos])
         if isinstance(elt, Group):

django/utils/timezone.py

@@ -13,6 +13,7 @@ except ImportError:
     pytz = None
 
 from django.conf import settings
+from django.utils import six
 
 __all__ = [
     'utc', 'get_default_timezone', 'get_current_timezone',
@@ -107,7 +108,7 @@ def get_default_timezone():
     """
     global _localtime
     if _localtime is None:
-        if isinstance(settings.TIME_ZONE, basestring) and pytz is not None:
+        if isinstance(settings.TIME_ZONE, six.string_types) and pytz is not None:
             _localtime = pytz.timezone(settings.TIME_ZONE)
         else:
             _localtime = LocalTimezone()
@@ -160,7 +161,7 @@ def activate(timezone):
     """
     if isinstance(timezone, tzinfo):
         _active.value = timezone
-    elif isinstance(timezone, basestring) and pytz is not None:
+    elif isinstance(timezone, six.string_types) and pytz is not None:
         _active.value = pytz.timezone(timezone)
     else:
         raise ValueError("Invalid timezone: %r" % timezone)

django/views/debug.py

@@ -15,6 +15,7 @@ from django.template.defaultfilters import force_escape, pprint
 from django.utils.html import escape
 from django.utils.importlib import import_module
 from django.utils.encoding import smart_unicode, smart_str
+from django.utils import six
 
 HIDDEN_SETTINGS = re.compile('API|TOKEN|KEY|SECRET|PASS|PROFANITIES_LIST|SIGNATURE')
 
@@ -214,7 +215,7 @@ class ExceptionReporter(object):
         self.loader_debug_info = None
 
         # Handle deprecated string exceptions
-        if isinstance(self.exc_type, basestring):
+        if isinstance(self.exc_type, six.string_types):
             self.exc_value = Exception('Deprecated String Exception: %r' % self.exc_type)
             self.exc_type = type(self.exc_value)
 

django/views/i18n.py

@@ -8,6 +8,7 @@ from django.utils.translation import check_for_language, activate, to_locale, ge
 from django.utils.text import javascript_quote
 from django.utils.encoding import smart_unicode
 from django.utils.formats import get_format_modules, get_format
+from django.utils import six
 
 def set_language(request):
     """
@@ -52,7 +53,7 @@ def get_formats():
             result[attr] = get_format(attr)
     src = []
     for k, v in result.items():
-        if isinstance(v, (basestring, int)):
+        if isinstance(v, (six.string_types, int)):
             src.append("formats['%s'] = '%s';\n" % (javascript_quote(k), javascript_quote(smart_unicode(v))))
         elif isinstance(v, (tuple, list)):
             v = [javascript_quote(smart_unicode(value)) for value in v]
@@ -184,7 +185,7 @@ def javascript_catalog(request, domain='djangojs', packages=None):
                 activate(request.GET['language'])
     if packages is None:
         packages = ['django.conf']
-    if isinstance(packages, basestring):
+    if isinstance(packages, six.string_types):
         packages = packages.split('+')
     packages = [p for p in packages if p == 'django.conf' or p in settings.INSTALLED_APPS]
     default_locale = to_locale(settings.LANGUAGE_CODE)
@@ -258,7 +259,7 @@ def javascript_catalog(request, domain='djangojs', packages=None):
     for k, v in t.items():
         if k == '':
             continue
-        if isinstance(k, basestring):
+        if isinstance(k, six.string_types):
             csrc.append("catalog['%s'] = '%s';\n" % (javascript_quote(k), javascript_quote(v)))
         elif isinstance(k, tuple):
             if k[0] not in pdict:

tests/modeltests/field_subclassing/fields.py

@@ -4,6 +4,7 @@ import json
 
 from django.db import models
 from django.utils.encoding import force_unicode
+from django.utils import six
 
 
 class Small(object):
@@ -66,7 +67,7 @@ class JSONField(models.TextField):
         if not value:
             return None
 
-        if isinstance(value, basestring):
+        if isinstance(value, six.string_types):
             value = json.loads(value)
         return value
 

tests/modeltests/serializers/tests.py

@@ -10,6 +10,7 @@ from django.conf import settings
 from django.core import serializers
 from django.db import transaction, connection
 from django.test import TestCase, TransactionTestCase, Approximate
+from django.utils import six
 from django.utils import unittest
 
 from .models import (Category, Author, Article, AuthorProfile, Actor, Movie,
@@ -461,7 +462,7 @@ else:
                     # yaml.safe_load will return non-string objects for some
                     # of the fields we are interested in, this ensures that
                     # everything comes back as a string
-                    if isinstance(field_value, basestring):
+                    if isinstance(field_value, six.string_types):
                         ret_list.append(field_value)
                     else:
                         ret_list.append(str(field_value))

tests/regressiontests/forms/tests/fields.py

@@ -35,10 +35,11 @@ from decimal import Decimal
 from django.core.files.uploadedfile import SimpleUploadedFile
 from django.forms import *
 from django.test import SimpleTestCase
+from django.utils import six
 
 
 def fix_os_paths(x):
-    if isinstance(x, basestring):
+    if isinstance(x, six.string_types):
         return x.replace('\\', '/')
     elif isinstance(x, tuple):
         return tuple(fix_os_paths(list(x)))

tests/regressiontests/i18n/commands/tests.py

@@ -2,13 +2,15 @@ import os
 import re
 from subprocess import Popen, PIPE
 
+from django.utils import six
+
 can_run_extraction_tests = False
 can_run_compilation_tests = False
 
 def find_command(cmd, path=None, pathext=None):
     if path is None:
         path = os.environ.get('PATH', []).split(os.pathsep)
-    if isinstance(path, basestring):
+    if isinstance(path, six.string_types):
         path = [path]
     # check if there are funny path extensions for executables, e.g. Windows
     if pathext is None:

tests/regressiontests/staticfiles_tests/tests.py

@@ -20,6 +20,7 @@ from django.test.utils import override_settings
 from django.utils.encoding import smart_unicode
 from django.utils.functional import empty
 from django.utils._os import rmtree_errorhandler
+from django.utils import six
 
 from django.contrib.staticfiles import finders, storage
 
@@ -83,7 +84,7 @@ class BaseStaticFilesTestCase(object):
         self.assertRaises(IOError, self._get_file, filepath)
 
     def render_template(self, template, **kwargs):
-        if isinstance(template, basestring):
+        if isinstance(template, six.string_types):
             template = loader.get_template_from_string(template)
         return template.render(Context(kwargs)).strip()