Refs #23919 -- Removed most of remaining six usage

Thanks Tim Graham for the review.

django/contrib/admin/options.py

@@ -36,7 +36,6 @@ from django.http import HttpResponseRedirect
 from django.http.response import HttpResponseBase
 from django.template.response import SimpleTemplateResponse, TemplateResponse
 from django.urls import reverse
-from django.utils import six
 from django.utils.decorators import method_decorator
 from django.utils.encoding import force_text
 from django.utils.html import format_html
@@ -92,7 +91,7 @@ FORMFIELD_FOR_DBFIELD_DEFAULTS = {
 csrf_protect_m = method_decorator(csrf_protect)
 
 
-class BaseModelAdmin(six.with_metaclass(forms.MediaDefiningClass)):
+class BaseModelAdmin(metaclass=forms.MediaDefiningClass):
     """Functionality common to both ModelAdmin and InlineAdmin."""
 
     raw_id_fields = ()
@@ -805,7 +804,7 @@ class ModelAdmin(BaseModelAdmin):
         tuple (name, description).
         """
         choices = [] + default_choices
-        for func, name, description in six.itervalues(self.get_actions(request)):
+        for func, name, description in self.get_actions(request).values():
             choice = (name, description % model_format_dict(self.opts))
             choices.append(choice)
         return choices

django/contrib/admin/sites.py

@@ -9,7 +9,6 @@ from django.db.models.base import ModelBase
 from django.http import Http404, HttpResponseRedirect
 from django.template.response import TemplateResponse
 from django.urls import NoReverseMatch, reverse
-from django.utils import six
 from django.utils.text import capfirst
 from django.utils.translation import ugettext as _, ugettext_lazy
 from django.views.decorators.cache import never_cache
@@ -169,7 +168,7 @@ class AdminSite(object):
         """
         Get all the enabled actions as an iterable of (name, func).
         """
-        return six.iteritems(self._actions)
+        return iter(self._actions.items())
 
     @property
     def empty_value_display(self):

django/contrib/admin/templatetags/admin_urls.py

@@ -1,8 +1,9 @@
+from urllib.parse import parse_qsl, urlparse, urlunparse
+
 from django import template
 from django.contrib.admin.utils import quote
 from django.urls import Resolver404, get_script_prefix, resolve
 from django.utils.http import urlencode
-from django.utils.six.moves.urllib.parse import parse_qsl, urlparse, urlunparse
 
 register = template.Library()
 

django/contrib/auth/decorators.py

@@ -1,11 +1,11 @@
 from functools import wraps
+from urllib.parse import urlparse
 
 from django.conf import settings
 from django.contrib.auth import REDIRECT_FIELD_NAME
 from django.core.exceptions import PermissionDenied
 from django.shortcuts import resolve_url
 from django.utils.decorators import available_attrs
-from django.utils.six.moves.urllib.parse import urlparse
 
 
 def user_passes_test(test_func, login_url=None, redirect_field_name=REDIRECT_FIELD_NAME):

django/contrib/auth/management/commands/createsuperuser.py

@@ -11,7 +11,6 @@ from django.core import exceptions
 from django.core.management.base import BaseCommand, CommandError
 from django.db import DEFAULT_DB_ALIAS
 from django.utils.encoding import force_str
-from django.utils.six.moves import input
 from django.utils.text import capfirst
 
 

django/contrib/auth/views.py

@@ -1,4 +1,5 @@
 import warnings
+from urllib.parse import urlparse, urlunparse
 
 from django.conf import settings
 # Avoid shadowing the login() and logout() views below.
@@ -20,7 +21,6 @@ from django.utils.decorators import method_decorator
 from django.utils.deprecation import RemovedInDjango21Warning
 from django.utils.encoding import force_text
 from django.utils.http import is_safe_url, urlsafe_base64_decode
-from django.utils.six.moves.urllib.parse import urlparse, urlunparse
 from django.utils.translation import ugettext_lazy as _
 from django.views.decorators.cache import never_cache
 from django.views.decorators.csrf import csrf_protect

django/contrib/contenttypes/checks.py

@@ -1,7 +1,6 @@
 from itertools import chain
 
 from django.apps import apps
-from django.utils import six
 
 
 def check_generic_foreign_keys(app_configs=None, **kwargs):
@@ -13,7 +12,7 @@ def check_generic_foreign_keys(app_configs=None, **kwargs):
         models = chain.from_iterable(app_config.get_models() for app_config in app_configs)
     errors = []
     fields = (
-        obj for model in models for obj in six.itervalues(vars(model))
+        obj for model in models for obj in vars(model).values()
         if isinstance(obj, GenericForeignKey)
     )
     for field in fields:

django/contrib/contenttypes/management/__init__.py

@@ -1,7 +1,6 @@
 from django.apps import apps as global_apps
 from django.db import DEFAULT_DB_ALIAS, migrations, router, transaction
 from django.db.utils import IntegrityError
-from django.utils import six
 
 
 class RenameContentType(migrations.RunPython):
@@ -126,7 +125,7 @@ def create_contenttypes(app_config, verbosity=2, interactive=True, using=DEFAULT
             app_label=app_label,
             model=model_name,
         )
-        for (model_name, model) in six.iteritems(app_models)
+        for (model_name, model) in app_models.items()
         if model_name not in content_types
     ]
     ContentType.objects.using(using).bulk_create(cts)

django/contrib/contenttypes/management/commands/remove_stale_contenttypes.py

@@ -3,8 +3,6 @@ from django.contrib.contenttypes.models import ContentType
 from django.core.management import BaseCommand
 from django.db import DEFAULT_DB_ALIAS, router
 from django.db.models.deletion import Collector
-from django.utils import six
-from django.utils.six.moves import input
 
 from ...management import get_contenttypes_and_models
 
@@ -32,7 +30,7 @@ class Command(BaseCommand):
             if not app_models:
                 continue
             to_remove = [
-                ct for (model_name, ct) in six.iteritems(content_types)
+                ct for (model_name, ct) in content_types.items()
                 if model_name not in app_models
             ]
             # Confirm that the content type is stale before deletion.

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

@@ -2,7 +2,6 @@ from cx_Oracle import CLOB
 
 from django.contrib.gis.db.backends.base.adapter import WKTAdapter
 from django.contrib.gis.geos import GeometryCollection, Polygon
-from django.utils.six.moves import range
 
 
 class OracleSpatialAdapter(WKTAdapter):

django/contrib/gis/gdal/datasource.py

@@ -41,7 +41,6 @@ from django.contrib.gis.gdal.error import GDALException, OGRIndexError
 from django.contrib.gis.gdal.layer import Layer
 from django.contrib.gis.gdal.prototypes import ds as capi
 from django.utils.encoding import force_bytes, force_text
-from django.utils.six.moves import range
 
 
 # For more information, see the OGR C API source code:

django/contrib/gis/gdal/feature.py

@@ -4,7 +4,6 @@ from django.contrib.gis.gdal.field import Field
 from django.contrib.gis.gdal.geometries import OGRGeometry, OGRGeomType
 from django.contrib.gis.gdal.prototypes import ds as capi, geom as geom_api
 from django.utils.encoding import force_bytes, force_text
-from django.utils.six.moves import range
 
 
 # For more information, see the OGR C API source code:

django/contrib/gis/gdal/geometries.py

@@ -51,9 +51,7 @@ from django.contrib.gis.gdal.geomtype import OGRGeomType
 from django.contrib.gis.gdal.prototypes import geom as capi, srs as srs_api
 from django.contrib.gis.gdal.srs import CoordTransform, SpatialReference
 from django.contrib.gis.geometry.regex import hex_regex, json_regex, wkt_regex
-from django.utils import six
 from django.utils.encoding import force_bytes
-from django.utils.six.moves import range
 
 
 # For more information, see the OGR C API source code:
@@ -71,7 +69,7 @@ class OGRGeometry(GDALBase):
 
         # If HEX, unpack input to a binary buffer.
         if str_instance and hex_regex.match(geom_input):
-            geom_input = six.memoryview(a2b_hex(geom_input.upper().encode()))
+            geom_input = memoryview(a2b_hex(geom_input.upper().encode()))
             str_instance = False
 
         # Constructing the geometry,
@@ -96,7 +94,7 @@ class OGRGeometry(GDALBase):
                 # (e.g., 'Point', 'POLYGON').
                 OGRGeomType(geom_input)
                 g = capi.create_geom(OGRGeomType(geom_input).num)
-        elif isinstance(geom_input, six.memoryview):
+        elif isinstance(geom_input, memoryview):
             # WKB was passed in
             g = self._from_wkb(geom_input)
         elif isinstance(geom_input, OGRGeomType):
@@ -353,7 +351,7 @@ class OGRGeometry(GDALBase):
         buf = (c_ubyte * sz)()
         capi.to_wkb(self.ptr, byteorder, byref(buf))
         # Returning a buffer of the string at the pointer.
-        return six.memoryview(string_at(buf, sz))
+        return memoryview(string_at(buf, sz))
 
     @property
     def wkt(self):

django/contrib/gis/gdal/layer.py

@@ -14,7 +14,6 @@ from django.contrib.gis.gdal.prototypes import (
 )
 from django.contrib.gis.gdal.srs import SpatialReference
 from django.utils.encoding import force_bytes, force_text
-from django.utils.six.moves import range
 
 
 # For more information, see the OGR C API source code:

django/contrib/gis/gdal/raster/band.py

@@ -4,9 +4,7 @@ from django.contrib.gis.gdal.base import GDALBase
 from django.contrib.gis.gdal.error import GDALException
 from django.contrib.gis.gdal.prototypes import raster as capi
 from django.contrib.gis.shortcuts import numpy
-from django.utils import six
 from django.utils.encoding import force_text
-from django.utils.six.moves import range
 
 from .const import GDAL_INTEGER_TYPES, GDAL_PIXEL_TYPES, GDAL_TO_CTYPES
 
@@ -207,7 +205,7 @@ class GDALBand(GDALBase):
             access_flag = 1
 
             # Instantiate ctypes array holding the input data
-            if isinstance(data, (bytes, six.memoryview)) or (numpy and isinstance(data, numpy.ndarray)):
+            if isinstance(data, (bytes, memoryview)) or (numpy and isinstance(data, numpy.ndarray)):
                 data_array = ctypes_array.from_buffer_copy(data)
             else:
                 data_array = ctypes_array(*data)

django/contrib/gis/geos/collections.py

@@ -12,7 +12,6 @@ from django.contrib.gis.geos.libgeos import geos_version_info, get_pointer_arr
 from django.contrib.gis.geos.linestring import LinearRing, LineString
 from django.contrib.gis.geos.point import Point
 from django.contrib.gis.geos.polygon import Polygon
-from django.utils.six.moves import range
 
 
 class GeometryCollection(GEOSGeometry):

django/contrib/gis/geos/coordseq.py

@@ -10,7 +10,6 @@ from django.contrib.gis.geos.base import GEOSBase
 from django.contrib.gis.geos.error import GEOSException
 from django.contrib.gis.geos.libgeos import CS_PTR
 from django.contrib.gis.shortcuts import numpy
-from django.utils.six.moves import range
 
 
 class GEOSCoordSeq(GEOSBase):

django/contrib/gis/geos/factory.py

@@ -1,5 +1,4 @@
 from django.contrib.gis.geos.geometry import GEOSGeometry, hex_regex, wkt_regex
-from django.utils import six
 
 
 def fromfile(file_h):
@@ -25,7 +24,7 @@ def fromfile(file_h):
     else:
         return GEOSGeometry(buf)
 
-    return GEOSGeometry(six.memoryview(buf))
+    return GEOSGeometry(memoryview(buf))
 
 
 def fromstr(string, **kwargs):

django/contrib/gis/geos/geometry.py

@@ -17,7 +17,6 @@ from django.contrib.gis.geos.prepared import PreparedGeometry
 from django.contrib.gis.geos.prototypes.io import (
     ewkb_w, wkb_r, wkb_w, wkt_r, wkt_w,
 )
-from django.utils import six
 from django.utils.deconstruct import deconstructible
 from django.utils.encoding import force_bytes, force_text
 
@@ -67,7 +66,7 @@ class GEOSGeometry(GEOSBase, ListMixin):
         elif isinstance(geo_input, GEOM_PTR):
             # When the input is a pointer to a geometry (GEOM_PTR).
             g = geo_input
-        elif isinstance(geo_input, six.memoryview):
+        elif isinstance(geo_input, memoryview):
             # When the input is a buffer (WKB).
             g = wkb_r().read(geo_input)
         elif isinstance(geo_input, GEOSGeometry):
@@ -149,7 +148,7 @@ class GEOSGeometry(GEOSBase, ListMixin):
     def __setstate__(self, state):
         # Instantiating from the tuple state that was pickled.
         wkb, srid = state
-        ptr = wkb_r().read(six.memoryview(wkb))
+        ptr = wkb_r().read(memoryview(wkb))
         if not ptr:
             raise GEOSException('Invalid Geometry loaded from pickled state.')
         self.ptr = ptr

django/contrib/gis/geos/linestring.py

@@ -4,7 +4,6 @@ from django.contrib.gis.geos.error import GEOSException
 from django.contrib.gis.geos.geometry import GEOSGeometry, LinearGeometryMixin
 from django.contrib.gis.geos.point import Point
 from django.contrib.gis.shortcuts import numpy
-from django.utils.six.moves import range
 
 
 class LineString(LinearGeometryMixin, GEOSGeometry):

django/contrib/gis/geos/mutable_list.py

@@ -10,8 +10,6 @@ Author: Aryeh Leib Taurog.
 """
 from functools import total_ordering
 
-from django.utils.six.moves import range
-
 
 @total_ordering
 class ListMixin(object):

django/contrib/gis/geos/point.py

@@ -4,7 +4,6 @@ from django.contrib.gis import gdal
 from django.contrib.gis.geos import prototypes as capi
 from django.contrib.gis.geos.error import GEOSException
 from django.contrib.gis.geos.geometry import GEOSGeometry
-from django.utils.six.moves import range
 
 
 class Point(GEOSGeometry):

django/contrib/gis/geos/polygon.py

@@ -4,7 +4,6 @@ from django.contrib.gis.geos import prototypes as capi
 from django.contrib.gis.geos.geometry import GEOSGeometry
 from django.contrib.gis.geos.libgeos import GEOM_PTR, get_pointer_arr
 from django.contrib.gis.geos.linestring import LinearRing
-from django.utils.six.moves import range
 
 
 class Polygon(GEOSGeometry):

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

@@ -7,7 +7,6 @@ from django.contrib.gis.geos.prototypes.errcheck import (
     check_geom, check_sized_string, check_string,
 )
 from django.contrib.gis.geos.prototypes.geom import c_uchar_p, geos_char_p
-from django.utils import six
 from django.utils.encoding import force_bytes
 
 
@@ -147,7 +146,7 @@ class _WKBReader(IOBase):
 
     def read(self, wkb):
         "Returns a _pointer_ to C GEOS Geometry object from the given WKB."
-        if isinstance(wkb, six.memoryview):
+        if isinstance(wkb, memoryview):
             wkb_s = bytes(wkb)
             return wkb_reader_read(self.ptr, wkb_s, len(wkb_s))
         elif isinstance(wkb, (bytes, str)):
@@ -240,7 +239,7 @@ class WKBWriter(IOBase):
             # Fix GEOS output for empty polygon.
             # See https://trac.osgeo.org/geos/ticket/680.
             wkb = wkb[:-8] + b'\0' * 4
-        return six.memoryview(wkb)
+        return memoryview(wkb)
 
     def write_hex(self, geom):
         "Returns the HEXEWKB representation of the given geometry."

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

@@ -7,7 +7,6 @@ from ctypes import POINTER, c_double, c_int
 from django.contrib.gis.geos.libgeos import GEOM_PTR, GEOSFuncFactory
 from django.contrib.gis.geos.prototypes.errcheck import check_dbl, check_string
 from django.contrib.gis.geos.prototypes.geom import geos_char_p
-from django.utils.six.moves import range
 
 __all__ = ['geos_area', 'geos_distance', 'geos_length', 'geos_isvalidreason']
 

django/contrib/gis/measure.py

@@ -38,8 +38,6 @@ and Geoff Biggs' PhD work on dimensioned units for robotics.
 from decimal import Decimal
 from functools import total_ordering
 
-from django.utils import six
-
 __all__ = ['A', 'Area', 'D', 'Distance']
 
 NUMERIC_TYPES = (int, float, Decimal)
@@ -187,7 +185,7 @@ class MeasureBase(object):
         """
         val = 0.0
         default_unit = self.STANDARD_UNIT
-        for unit, value in six.iteritems(kwargs):
+        for unit, value in kwargs.items():
             if not isinstance(value, float):
                 value = float(value)
             if unit in self.UNITS:

django/contrib/gis/utils/ogrinspect.py

@@ -8,7 +8,6 @@ from django.contrib.gis.gdal.field import (
     OFTDate, OFTDateTime, OFTInteger, OFTInteger64, OFTReal, OFTString,
     OFTTime,
 )
-from django.utils.six.moves import zip
 
 
 def mapping(data_source, geom_name='geom', layer_key=0, multi_geom=False):

django/contrib/messages/storage/cookie.py

@@ -3,7 +3,6 @@ import json
 from django.conf import settings
 from django.contrib.messages.storage.base import BaseStorage, Message
 from django.http import SimpleCookie
-from django.utils import six
 from django.utils.crypto import constant_time_compare, salted_hmac
 from django.utils.safestring import SafeData, mark_safe
 
@@ -42,7 +41,7 @@ class MessageDecoder(json.JSONDecoder):
             return [self.process_messages(item) for item in obj]
         if isinstance(obj, dict):
             return {key: self.process_messages(value)
-                    for key, value in six.iteritems(obj)}
+                    for key, value in obj.items()}
         return obj
 
     def decode(self, s, **kwargs):

django/contrib/sessions/backends/cache.py

@@ -3,7 +3,6 @@ from django.contrib.sessions.backends.base import (
     CreateError, SessionBase, UpdateError,
 )
 from django.core.cache import caches
-from django.utils.six.moves import range
 
 KEY_PREFIX = "django.contrib.sessions.cache"
 

django/contrib/sessions/serializers.py

@@ -1,9 +1,6 @@
-from django.core.signing import JSONSerializer as BaseJSONSerializer
+import pickle
 
-try:
-    from django.utils.six.moves import cPickle as pickle
-except ImportError:
-    import pickle
+from django.core.signing import JSONSerializer as BaseJSONSerializer
 
 
 class PickleSerializer(object):

django/contrib/sitemaps/__init__.py

@@ -1,11 +1,12 @@
+from urllib.parse import urlencode
+from urllib.request import urlopen
+
 from django.apps import apps as django_apps
 from django.conf import settings
 from django.core import paginator
 from django.core.exceptions import ImproperlyConfigured
 from django.urls import NoReverseMatch, reverse
 from django.utils import translation
-from django.utils.six.moves.urllib.parse import urlencode
-from django.utils.six.moves.urllib.request import urlopen
 
 PING_URL = "https://www.google.com/webmasters/tools/ping"
 

django/contrib/staticfiles/finders.py

@@ -8,7 +8,7 @@ from django.core.exceptions import ImproperlyConfigured
 from django.core.files.storage import (
     FileSystemStorage, Storage, default_storage,
 )
-from django.utils import lru_cache, six
+from django.utils import lru_cache
 from django.utils._os import safe_join
 from django.utils.functional import LazyObject, empty
 from django.utils.module_loading import import_string
@@ -143,7 +143,7 @@ class AppDirectoriesFinder(BaseFinder):
         """
         List all files in all app storages.
         """
-        for storage in six.itervalues(self.storages):
+        for storage in self.storages.values():
             if storage.exists(''):  # check if storage location exists
                 for path in utils.get_files(storage, ignore_patterns):
                     yield path, storage

django/contrib/staticfiles/handlers.py

@@ -1,9 +1,10 @@
+from urllib.parse import urlparse
+from urllib.request import url2pathname
+
 from django.conf import settings
 from django.contrib.staticfiles import utils
 from django.contrib.staticfiles.views import serve
 from django.core.handlers.wsgi import WSGIHandler, get_path_info
-from django.utils.six.moves.urllib.parse import urlparse
-from django.utils.six.moves.urllib.request import url2pathname
 
 
 class StaticFilesHandler(WSGIHandler):

django/contrib/staticfiles/management/commands/collectstatic.py

@@ -9,7 +9,6 @@ from django.core.management.base import BaseCommand, CommandError
 from django.core.management.color import no_style
 from django.utils.encoding import force_text
 from django.utils.functional import cached_property
-from django.utils.six.moves import input
 
 
 class Command(BaseCommand):

django/contrib/staticfiles/storage.py

@@ -4,6 +4,7 @@ import os
 import posixpath
 import re
 from collections import OrderedDict
+from urllib.parse import unquote, urldefrag, urlsplit, urlunsplit
 
 from django.conf import settings
 from django.contrib.staticfiles.utils import check_settings, matches_patterns
@@ -15,11 +16,6 @@ from django.core.files.base import ContentFile
 from django.core.files.storage import FileSystemStorage, get_storage_class
 from django.utils.encoding import force_bytes, force_text
 from django.utils.functional import LazyObject
-from django.utils.six import iteritems
-from django.utils.six.moves import range
-from django.utils.six.moves.urllib.parse import (
-    unquote, urldefrag, urlsplit, urlunsplit,
-)
 
 
 class StaticFilesStorage(FileSystemStorage):
@@ -293,7 +289,7 @@ class HashedFilesMixin(object):
                 if name in adjustable_paths:
                     old_hashed_name = hashed_name
                     content = original_file.read().decode(settings.FILE_CHARSET)
-                    for extension, patterns in iteritems(self._patterns):
+                    for extension, patterns in self._patterns.items():
                         if matches_patterns(path, (extension,)):
                             for pattern, template in patterns:
                                 converter = self.url_converter(name, hashed_files, template)

django/contrib/staticfiles/views.py

@@ -5,11 +5,11 @@ development, and SHOULD NOT be used in a production setting.
 """
 import os
 import posixpath
+from urllib.parse import unquote
 
 from django.conf import settings
 from django.contrib.staticfiles import finders
 from django.http import Http404
-from django.utils.six.moves.urllib.parse import unquote
 from django.views import static
 
 

django/contrib/syndication/views.py

@@ -5,7 +5,7 @@ from django.contrib.sites.shortcuts import get_current_site
 from django.core.exceptions import ImproperlyConfigured, ObjectDoesNotExist
 from django.http import Http404, HttpResponse
 from django.template import TemplateDoesNotExist, loader
-from django.utils import feedgenerator, six
+from django.utils import feedgenerator
 from django.utils.encoding import force_text, iri_to_uri
 from django.utils.html import escape
 from django.utils.http import http_date
@@ -83,9 +83,9 @@ class Feed(object):
             # catching the TypeError, because something inside the function
             # may raise the TypeError. This technique is more accurate.
             try:
-                code = six.get_function_code(attr)
+                code = attr.__code__
             except AttributeError:
-                code = six.get_function_code(attr.__call__)
+                code = attr.__call__.__code__
             if code.co_argcount == 2:       # one argument is 'self'
                 return attr(obj)
             else:

django/core/cache/backends/db.py

@@ -1,5 +1,6 @@
 "Database cache backend."
 import base64
+import pickle
 from datetime import datetime
 
 from django.conf import settings
@@ -8,11 +9,6 @@ from django.db import DatabaseError, connections, models, router, transaction
 from django.utils import timezone
 from django.utils.encoding import force_bytes
 
-try:
-    from django.utils.six.moves import cPickle as pickle
-except ImportError:
-    import pickle
-
 
 class Options(object):
     """A class that will quack like a Django model _meta class.

django/core/cache/backends/filebased.py

@@ -4,6 +4,7 @@ import glob
 import hashlib
 import io
 import os
+import pickle
 import random
 import tempfile
 import time
@@ -13,11 +14,6 @@ from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache
 from django.core.files.move import file_move_safe
 from django.utils.encoding import force_bytes
 
-try:
-    from django.utils.six.moves import cPickle as pickle
-except ImportError:
-    import pickle
-
 
 class FileBasedCache(BaseCache):
     cache_suffix = '.djcache'

django/core/cache/backends/locmem.py

@@ -1,17 +1,12 @@
 "Thread-safe in-memory cache backend."
 
+import pickle
 import time
 from contextlib import contextmanager
 
 from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache
 from django.utils.synch import RWLock
 
-try:
-    from django.utils.six.moves import cPickle as pickle
-except ImportError:
-    import pickle
-
-
 # Global in-memory store of cache data. Keyed by name, to provide
 # multiple named local memory caches.
 _caches = {}

django/core/files/storage.py

@@ -1,6 +1,7 @@
 import errno
 import os
 from datetime import datetime
+from urllib.parse import urljoin
 
 from django.conf import settings
 from django.core.exceptions import SuspiciousFileOperation
@@ -14,7 +15,6 @@ from django.utils.deconstruct import deconstructible
 from django.utils.encoding import filepath_to_uri, force_text
 from django.utils.functional import LazyObject, cached_property
 from django.utils.module_loading import import_string
-from django.utils.six.moves.urllib.parse import urljoin
 from django.utils.text import get_valid_filename
 
 __all__ = ('Storage', 'FileSystemStorage', 'DefaultStorage', 'default_storage')

django/core/mail/message.py

@@ -14,11 +14,10 @@ from email.mime.message import MIMEMessage
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
 from email.utils import formatdate, getaddresses, parseaddr
-from io import BytesIO
+from io import BytesIO, StringIO
 
 from django.conf import settings
 from django.core.mail.utils import DNS_NAME
-from django.utils import six
 from django.utils.encoding import force_text
 
 # Don't BASE64-encode UTF-8 messages so that we avoid unwanted attention from
@@ -164,7 +163,7 @@ class MIMEMixin():
         This overrides the default as_string() implementation to not mangle
         lines that begin with 'From '. See bug #13433 for details.
         """
-        fp = six.StringIO()
+        fp = StringIO()
         g = generator.Generator(fp, mangle_from_=False)
         g.flatten(self, unixfrom=unixfrom, linesep=linesep)
         return fp.getvalue()

django/core/management/__init__.py

@@ -12,7 +12,7 @@ from django.core.management.base import (
     BaseCommand, CommandError, CommandParser, handle_default_options,
 )
 from django.core.management.color import color_style
-from django.utils import autoreload, lru_cache, six
+from django.utils import autoreload, lru_cache
 from django.utils._os import npath, upath
 from django.utils.encoding import force_text
 
@@ -154,7 +154,7 @@ class ManagementUtility(object):
                 "Available subcommands:",
             ]
             commands_dict = defaultdict(lambda: [])
-            for name, app in six.iteritems(get_commands()):
+            for name, app in get_commands().items():
                 if app == 'django.core':
                     app = 'django'
                 else:

django/core/management/commands/flush.py

@@ -7,7 +7,6 @@ from django.core.management.color import no_style
 from django.core.management.sql import emit_post_migrate_signal, sql_flush
 from django.db import DEFAULT_DB_ALIAS, connections, transaction
 from django.utils import six
-from django.utils.six.moves import input
 
 
 class Command(BaseCommand):

django/core/management/commands/makemigrations.py

@@ -17,8 +17,6 @@ from django.db.migrations.questioner import (
 from django.db.migrations.state import ProjectState
 from django.db.migrations.utils import get_migration_name_timestamp
 from django.db.migrations.writer import MigrationWriter
-from django.utils.six import iteritems
-from django.utils.six.moves import zip
 
 
 class Command(BaseCommand):
@@ -102,7 +100,7 @@ class Command(BaseCommand):
         # If app_labels is specified, filter out conflicting migrations for unspecified apps
         if app_labels:
             conflicts = {
-                app_label: conflict for app_label, conflict in iteritems(conflicts)
+                app_label: conflict for app_label, conflict in conflicts.items()
                 if app_label in app_labels
             }
 

django/core/management/commands/squashmigrations.py

@@ -7,7 +7,6 @@ from django.db.migrations.loader import AmbiguityError, MigrationLoader
 from django.db.migrations.migration import SwappableTuple
 from django.db.migrations.optimizer import MigrationOptimizer
 from django.db.migrations.writer import MigrationWriter
-from django.utils import six
 from django.utils.version import get_docs_version
 
 
@@ -86,7 +85,7 @@ class Command(BaseCommand):
             if self.interactive:
                 answer = None
                 while not answer or answer not in "yn":
-                    answer = six.moves.input("Do you wish to proceed? [yN] ")
+                    answer = input("Do you wish to proceed? [yN] ")
                     if not answer:
                         answer = "n"
                         break

django/core/management/templates.py

@@ -10,6 +10,7 @@ import stat
 import sys
 import tempfile
 from os import path
+from urllib.request import urlretrieve
 
 import django
 from django.conf import settings
@@ -17,7 +18,6 @@ from django.core.management.base import BaseCommand, CommandError
 from django.core.management.utils import handle_extensions
 from django.template import Context, Engine
 from django.utils import archive
-from django.utils.six.moves.urllib.request import urlretrieve
 from django.utils.version import get_docs_version
 
 _drive_re = re.compile('^([a-z]):', re.I)

django/core/paginator.py

@@ -2,7 +2,6 @@ import collections
 import warnings
 from math import ceil
 
-from django.utils import six
 from django.utils.functional import cached_property
 from django.utils.translation import ugettext_lazy as _
 
@@ -99,7 +98,7 @@ class Paginator(object):
         Returns a 1-based range of pages for iterating through within
         a template for loop.
         """
-        return six.moves.range(1, self.num_pages + 1)
+        return range(1, self.num_pages + 1)
 
     def _check_object_list_is_ordered(self):
         """

django/core/serializers/__init__.py

@@ -21,7 +21,6 @@ import importlib
 from django.apps import apps
 from django.conf import settings
 from django.core.serializers.base import SerializerDoesNotExist
-from django.utils import six
 
 # Built-in serializers
 BUILTIN_SERIALIZERS = {
@@ -109,7 +108,7 @@ def get_serializer_formats():
 def get_public_serializer_formats():
     if not _serializers:
         _load_serializers()
-    return [k for k, v in six.iteritems(_serializers) if not v.Serializer.internal_use_only]
+    return [k for k, v in _serializers.items() if not v.Serializer.internal_use_only]
 
 
 def get_deserializer(format):

django/core/serializers/base.py

@@ -1,8 +1,9 @@
 """
 Module for abstract serializer/unserializer base classes.
 """
+from io import StringIO
+
 from django.db import models
-from django.utils import six
 
 
 class SerializerDoesNotExist(KeyError):
@@ -59,7 +60,7 @@ class Serializer(object):
     # internal Django use.
     internal_use_only = False
     progress_class = ProgressBar
-    stream_class = six.StringIO
+    stream_class = StringIO
 
     def serialize(self, queryset, **options):
         """
@@ -158,7 +159,7 @@ class Serializer(object):
             return self.stream.getvalue()
 
 
-class Deserializer(six.Iterator):
+class Deserializer:
     """
     Abstract base deserializer class.
     """
@@ -169,7 +170,7 @@ class Deserializer(six.Iterator):
         """
         self.options = options
         if isinstance(stream_or_string, str):
-            self.stream = six.StringIO(stream_or_string)
+            self.stream = StringIO(stream_or_string)
         else:
             self.stream = stream_or_string
 

django/core/serializers/python.py

@@ -9,7 +9,6 @@ from django.apps import apps
 from django.conf import settings
 from django.core.serializers import base
 from django.db import DEFAULT_DB_ALIAS, models
-from django.utils import six
 from django.utils.encoding import force_text, is_protected_type
 
 
@@ -113,7 +112,7 @@ def Deserializer(object_list, **options):
         field_names = field_names_cache[Model]
 
         # Handle each field
-        for (field_name, field_value) in six.iteritems(d["fields"]):
+        for (field_name, field_value) in d["fields"].items():
 
             if ignore and field_name not in field_names:
                 # skip fields no longer on model

django/core/servers/basehttp.py

@@ -9,6 +9,7 @@ been reviewed for security issues. DON'T USE IT FOR PRODUCTION USE!
 
 import logging
 import socket
+import socketserver
 import sys
 from wsgiref import simple_server
 
@@ -16,7 +17,6 @@ from django.core.exceptions import ImproperlyConfigured
 from django.core.wsgi import get_wsgi_application
 from django.utils import six
 from django.utils.module_loading import import_string
-from django.utils.six.moves import socketserver
 
 __all__ = ('WSGIServer', 'WSGIRequestHandler')
 

django/core/validators.py

@@ -1,12 +1,12 @@
 import os
 import re
+from urllib.parse import urlsplit, urlunsplit
 
 from django.core.exceptions import ValidationError
 from django.utils.deconstruct import deconstructible
 from django.utils.encoding import force_text
 from django.utils.functional import SimpleLazyObject
 from django.utils.ipv6 import is_valid_ipv6_address
-from django.utils.six.moves.urllib.parse import urlsplit, urlunsplit
 from django.utils.translation import ugettext_lazy as _, ungettext_lazy
 
 # These values, if given to validate(), will trigger the self.required check.

django/db/backends/base/base.py

@@ -4,6 +4,7 @@ import warnings
 from collections import deque
 from contextlib import contextmanager
 
+import _thread
 import pytz
 
 from django.conf import settings
@@ -16,7 +17,6 @@ from django.db.transaction import TransactionManagementError
 from django.db.utils import DatabaseError, DatabaseErrorWrapper
 from django.utils import timezone
 from django.utils.functional import cached_property
-from django.utils.six.moves import _thread as thread
 
 NO_DB_ALIAS = '__no_db__'
 
@@ -82,7 +82,7 @@ class BaseDatabaseWrapper(object):
 
         # Thread-safety related attributes.
         self.allow_thread_sharing = allow_thread_sharing
-        self._thread_ident = thread.get_ident()
+        self._thread_ident = _thread.get_ident()
 
         # A list of no-argument functions to run when the transaction commits.
         # Each entry is an (sids, func) tuple, where sids is a set of the
@@ -326,7 +326,7 @@ class BaseDatabaseWrapper(object):
         if not self._savepoint_allowed():
             return
 
-        thread_ident = thread.get_ident()
+        thread_ident = _thread.get_ident()
         tid = str(thread_ident).replace('-', '')
 
         self.savepoint_state += 1
@@ -533,13 +533,13 @@ class BaseDatabaseWrapper(object):
         authorized to be shared between threads (via the `allow_thread_sharing`
         property). Raises an exception if the validation fails.
         """
-        if not (self.allow_thread_sharing or self._thread_ident == thread.get_ident()):
+        if not (self.allow_thread_sharing or self._thread_ident == _thread.get_ident()):
             raise DatabaseError(
                 "DatabaseWrapper objects created in a "
                 "thread can only be used in that same thread. The object "
                 "with alias '%s' was created in thread id %s and this is "
                 "thread id %s."
-                % (self.alias, self._thread_ident, thread.get_ident())
+                % (self.alias, self._thread_ident, _thread.get_ident())
             )
 
     # ##### Miscellaneous #####

django/db/backends/base/creation.py

@@ -1,11 +1,10 @@
 import sys
+from io import StringIO
 
 from django.apps import apps
 from django.conf import settings
 from django.core import serializers
 from django.db import router
-from django.utils.six import StringIO
-from django.utils.six.moves import input
 
 # The prefix to put on the default database name when creating
 # the test database.

django/db/backends/oracle/base.py

@@ -516,7 +516,7 @@ class FormatStylePlaceholderCursor(object):
         return CursorIterator(self.cursor)
 
 
-class CursorIterator(six.Iterator):
+class CursorIterator:
     """
     Cursor iterator wrapper that invokes our custom row factory.
     """

django/db/backends/oracle/creation.py

@@ -5,7 +5,6 @@ from django.db.backends.base.creation import BaseDatabaseCreation
 from django.db.utils import DatabaseError
 from django.utils.crypto import get_random_string
 from django.utils.functional import cached_property
-from django.utils.six.moves import input
 
 TEST_DATABASE_PREFIX = 'test_'
 

django/db/backends/postgresql/client.py

@@ -3,7 +3,6 @@ import subprocess
 
 from django.core.files.temp import NamedTemporaryFile
 from django.db.backends.base.client import BaseDatabaseClient
-from django.utils.six import print_
 
 
 def _escape_pgpass(txt):
@@ -40,7 +39,7 @@ class DatabaseClient(BaseDatabaseClient):
                 # Create temporary .pgpass file.
                 temp_pgpass = NamedTemporaryFile(mode='w+')
                 try:
-                    print_(
+                    print(
                         _escape_pgpass(host) or '*',
                         str(port) or '*',
                         _escape_pgpass(dbname) or '*',

django/db/backends/sqlite3/creation.py

@@ -5,7 +5,6 @@ import sys
 from django.core.exceptions import ImproperlyConfigured
 from django.db.backends.base.creation import BaseDatabaseCreation
 from django.utils.encoding import force_text
-from django.utils.six.moves import input
 
 
 class DatabaseCreation(BaseDatabaseCreation):

django/db/migrations/loader.py

@@ -1,6 +1,6 @@
 import os
 import sys
-from importlib import import_module
+from importlib import import_module, reload
 
 from django.apps import apps
 from django.conf import settings
@@ -97,7 +97,7 @@ class MigrationLoader(object):
                     continue
                 # Force a reload if it's already loaded (tests need this)
                 if was_loaded:
-                    six.moves.reload_module(module)
+                    reload(module)
             self.migrated_apps.add(app_config.label)
             directory = os.path.dirname(module.__file__)
             # Scan for .py files

django/db/migrations/questioner.py

@@ -5,7 +5,6 @@ import sys
 from django.apps import apps
 from django.db.models.fields import NOT_PROVIDED
 from django.utils import datetime_safe, timezone
-from django.utils.six.moves import input
 
 from .loader import MigrationLoader
 

django/db/migrations/serializer.py

@@ -1,3 +1,4 @@
+import builtins
 import collections
 import datetime
 import decimal
@@ -10,7 +11,7 @@ from importlib import import_module
 from django.db import models
 from django.db.migrations.operations.base import Operation
 from django.db.migrations.utils import COMPILED_REGEX_TYPE, RegexObject
-from django.utils import datetime_safe, six
+from django.utils import datetime_safe
 from django.utils.encoding import force_text
 from django.utils.functional import LazyObject, Promise
 from django.utils.timezone import utc
@@ -305,7 +306,7 @@ class TypeSerializer(BaseSerializer):
                 return string, set(imports)
         if hasattr(self.value, "__module__"):
             module = self.value.__module__
-            if module == six.moves.builtins.__name__:
+            if module == builtins.__name__:
                 return self.value.__name__, set()
             else:
                 return "%s.%s" % (module, self.value.__name__), {"import %s" % module}

django/db/models/base.py

@@ -26,10 +26,8 @@ from django.db.models.signals import (
     class_prepared, post_init, post_save, pre_init, pre_save,
 )
 from django.db.models.utils import make_model_tuple
-from django.utils import six
 from django.utils.encoding import force_str, force_text
 from django.utils.functional import curry
-from django.utils.six.moves import zip
 from django.utils.text import capfirst, get_text_list
 from django.utils.translation import ugettext_lazy as _
 from django.utils.version import get_version
@@ -385,7 +383,7 @@ class ModelState(object):
         self.adding = True
 
 
-class Model(six.with_metaclass(ModelBase)):
+class Model(metaclass=ModelBase):
 
     def __init__(self, *args, **kwargs):
         # Alias some things as locals to avoid repeat global lookups

django/db/models/deletion.py

@@ -3,7 +3,6 @@ from operator import attrgetter
 
 from django.db import IntegrityError, connections, transaction
 from django.db.models import signals, sql
-from django.utils import six
 
 
 class ProtectedError(IntegrityError):
@@ -198,7 +197,7 @@ class Collector(object):
             # Recursively collect concrete model's parent models, but not their
             # related objects. These will be found by meta.get_fields()
             concrete_model = model._meta.concrete_model
-            for ptr in six.itervalues(concrete_model._meta.parents):
+            for ptr in concrete_model._meta.parents.values():
                 if ptr:
                     parent_objs = [getattr(obj, ptr.name) for obj in new_objs]
                     self.collect(parent_objs, source=model,
@@ -236,7 +235,7 @@ class Collector(object):
         )
 
     def instances_with_model(self):
-        for model, instances in six.iteritems(self.data):
+        for model, instances in self.data.items():
             for obj in instances:
                 yield model, obj
 
@@ -285,18 +284,18 @@ class Collector(object):
                 deleted_counter[qs.model._meta.label] += count
 
             # update fields
-            for model, instances_for_fieldvalues in six.iteritems(self.field_updates):
+            for model, instances_for_fieldvalues in self.field_updates.items():
                 query = sql.UpdateQuery(model)
-                for (field, value), instances in six.iteritems(instances_for_fieldvalues):
+                for (field, value), instances in instances_for_fieldvalues.items():
                     query.update_batch([obj.pk for obj in instances],
                                        {field.name: value}, self.using)
 
             # reverse instance collections
-            for instances in six.itervalues(self.data):
+            for instances in self.data.values():
                 instances.reverse()
 
             # delete instances
-            for model, instances in six.iteritems(self.data):
+            for model, instances in self.data.items():
                 query = sql.DeleteQuery(model)
                 pk_list = [obj.pk for obj in instances]
                 count = query.delete_batch(pk_list, self.using)
@@ -309,11 +308,11 @@ class Collector(object):
                         )
 
         # update collected instances
-        for model, instances_for_fieldvalues in six.iteritems(self.field_updates):
-            for (field, value), instances in six.iteritems(instances_for_fieldvalues):
+        for model, instances_for_fieldvalues in self.field_updates.items():
+            for (field, value), instances in instances_for_fieldvalues.items():
                 for obj in instances:
                     setattr(obj, field.attname, value)
-        for model, instances in six.iteritems(self.data):
+        for model, instances in self.data.items():
             for instance in instances:
                 setattr(instance, model._meta.pk.attname, None)
         return sum(deleted_counter.values()), dict(deleted_counter)

django/db/models/lookups.py

@@ -10,7 +10,6 @@ from django.db.models.fields import (
 )
 from django.db.models.query_utils import RegisterLookupMixin
 from django.utils.functional import cached_property
-from django.utils.six.moves import range
 
 
 class Lookup(object):

django/db/models/options.py

@@ -13,7 +13,6 @@ from django.db.models.fields import AutoField
 from django.db.models.fields.proxy import OrderWrt
 from django.db.models.fields.related import OneToOneField
 from django.db.models.query_utils import PathInfo
-from django.utils import six
 from django.utils.datastructures import ImmutableList, OrderedSet
 from django.utils.deprecation import RemovedInDjango21Warning
 from django.utils.encoding import force_text
@@ -228,7 +227,7 @@ class Options(object):
             if self.parents:
                 # Promote the first parent link in lieu of adding yet another
                 # field.
-                field = next(six.itervalues(self.parents))
+                field = next(iter(self.parents.values()))
                 # Look for a local field with the same name as the
                 # first parent link. If a local field has already been
                 # created, use it instead of promoting the parent

django/db/models/query.py

@@ -480,7 +480,7 @@ class QuerySet(object):
                 obj, created = self._create_object_from_params(lookup, params)
                 if created:
                     return obj, created
-            for k, v in six.iteritems(defaults):
+            for k, v in defaults.items():
                 setattr(obj, k, v() if callable(v) else v)
             obj.save(using=self.db)
         return obj, False
@@ -1170,7 +1170,7 @@ class InstanceCheckMeta(type):
         return isinstance(instance, QuerySet) and instance.query.is_empty()
 
 
-class EmptyQuerySet(six.with_metaclass(InstanceCheckMeta)):
+class EmptyQuerySet(metaclass=InstanceCheckMeta):
     """
     Marker class usable for checking if a queryset is empty by .none():
         isinstance(qs.none(), EmptyQuerySet) -> True

django/db/models/sql/compiler.py

@@ -11,7 +11,6 @@ from django.db.models.sql.constants import (
 from django.db.models.sql.query import Query, get_order_dir
 from django.db.transaction import TransactionManagementError
 from django.db.utils import DatabaseError
-from django.utils.six.moves import zip
 
 FORCE = object()
 

django/db/models/sql/query.py

@@ -30,7 +30,6 @@ from django.db.models.sql.datastructures import (
 from django.db.models.sql.where import (
     AND, OR, ExtraWhere, NothingNode, WhereNode,
 )
-from django.utils import six
 from django.utils.encoding import force_text
 from django.utils.tree import Node
 
@@ -104,7 +103,7 @@ class RawQuery(object):
         if params_type is tuple:
             params = tuple(adapter(val) for val in self.params)
         elif params_type is dict:
-            params = dict((key, adapter(val)) for key, val in six.iteritems(self.params))
+            params = {key: adapter(val) for key, val in self.params.items()}
         else:
             raise RuntimeError("Unexpected params type: %s" % params_type)
 
@@ -665,23 +664,23 @@ class Query(object):
             # slight complexity here is handling fields that exist on parent
             # models.
             workset = {}
-            for model, values in six.iteritems(seen):
+            for model, values in seen.items():
                 for field in model._meta.fields:
                     if field in values:
                         continue
                     m = field.model._meta.concrete_model
                     add_to_dict(workset, m, field)
-            for model, values in six.iteritems(must_include):
+            for model, values in must_include.items():
                 # If we haven't included a model in workset, we don't add the
                 # corresponding must_include fields for that model, since an
                 # empty set means "include all fields". That's why there's no
                 # "else" branch here.
                 if model in workset:
                     workset[model].update(values)
-            for model, values in six.iteritems(workset):
+            for model, values in workset.items():
                 callback(target, model, values)
         else:
-            for model, values in six.iteritems(must_include):
+            for model, values in must_include.items():
                 if model in seen:
                     seen[model].update(values)
                 else:
@@ -695,7 +694,7 @@ class Query(object):
             for model in orig_opts.get_parent_list():
                 if model not in seen:
                     seen[model] = set()
-            for model, values in six.iteritems(seen):
+            for model, values in seen.items():
                 callback(target, model, values)
 
     def table_alias(self, table_name, create=False):
@@ -813,7 +812,7 @@ class Query(object):
                 (key, col.relabeled_clone(change_map)) for key, col in self._annotations.items())
 
         # 2. Rename the alias in the internal table/alias datastructures.
-        for old_alias, new_alias in six.iteritems(change_map):
+        for old_alias, new_alias in change_map.items():
             if old_alias not in self.alias_map:
                 continue
             alias_data = self.alias_map[old_alias].relabeled_clone(change_map)
@@ -1698,7 +1697,7 @@ class Query(object):
             self.group_by.append(col)
 
         if self.annotation_select:
-            for alias, annotation in six.iteritems(self.annotation_select):
+            for alias, annotation in self.annotation_select.items():
                 for col in annotation.get_group_by_cols():
                     self.group_by.append(col)
 

django/db/models/sql/subqueries.py

@@ -9,7 +9,6 @@ from django.db.models.sql.constants import (
     CURSOR, GET_ITERATOR_CHUNK_SIZE, NO_RESULTS,
 )
 from django.db.models.sql.query import Query
-from django.utils import six
 
 __all__ = ['DeleteQuery', 'UpdateQuery', 'InsertQuery', 'AggregateQuery']
 
@@ -120,7 +119,7 @@ class UpdateQuery(Query):
         querysets.
         """
         values_seq = []
-        for name, val in six.iteritems(values):
+        for name, val in values.items():
             field = self.get_meta().get_field(name)
             direct = not (field.auto_created and not field.concrete) or not field.concrete
             model = field.model._meta.concrete_model
@@ -164,7 +163,7 @@ class UpdateQuery(Query):
         if not self.related_updates:
             return []
         result = []
-        for model, values in six.iteritems(self.related_updates):
+        for model, values in self.related_updates.items():
             query = UpdateQuery(model)
             query.values = values
             if self.related_ids is not None:

django/dispatch/dispatcher.py

@@ -3,7 +3,6 @@ import threading
 import weakref
 
 from django.utils.inspect import func_accepts_kwargs
-from django.utils.six.moves import range
 
 
 def _make_id(target):

django/forms/fields.py

@@ -11,6 +11,7 @@ import sys
 import uuid
 from decimal import Decimal, DecimalException
 from io import BytesIO
+from urllib.parse import urlsplit, urlunsplit
 
 from django.core import validators
 from django.core.exceptions import ValidationError
@@ -30,7 +31,6 @@ from django.utils.dateparse import parse_duration
 from django.utils.duration import duration_string
 from django.utils.encoding import force_str, force_text
 from django.utils.ipv6 import clean_ipv6_address
-from django.utils.six.moves.urllib.parse import urlsplit, urlunsplit
 from django.utils.translation import ugettext_lazy as _, ungettext_lazy
 
 __all__ = (

django/forms/forms.py

@@ -12,7 +12,6 @@ from django.forms.fields import Field, FileField
 # pretty_name is imported for backwards compatibility in Django 1.9
 from django.forms.utils import ErrorDict, ErrorList, pretty_name  # NOQA
 from django.forms.widgets import Media, MediaDefiningClass
-from django.utils import six
 from django.utils.encoding import force_text
 from django.utils.functional import cached_property
 from django.utils.html import conditional_escape, html_safe
@@ -504,7 +503,7 @@ class BaseForm(object):
         return value
 
 
-class Form(six.with_metaclass(DeclarativeFieldsMetaclass, BaseForm)):
+class Form(BaseForm, metaclass=DeclarativeFieldsMetaclass):
     "A collection of Fields, plus their associated data."
     # This is a separate class from BaseForm in order to abstract the way
     # self.fields is specified. This class (Form) is the one that does the

django/forms/formsets.py

@@ -6,7 +6,6 @@ from django.forms.widgets import HiddenInput
 from django.utils.functional import cached_property
 from django.utils.html import html_safe
 from django.utils.safestring import mark_safe
-from django.utils.six.moves import range
 from django.utils.translation import ugettext as _, ungettext
 
 __all__ = ('BaseFormSet', 'formset_factory', 'all_valid')

django/forms/models.py

@@ -16,7 +16,6 @@ from django.forms.utils import ErrorList
 from django.forms.widgets import (
     HiddenInput, MultipleHiddenInput, SelectMultiple,
 )
-from django.utils import six
 from django.utils.encoding import force_text
 from django.utils.text import capfirst, get_text_list
 from django.utils.translation import ugettext, ugettext_lazy as _
@@ -250,7 +249,7 @@ class ModelFormMetaclass(DeclarativeFieldsMetaclass):
                                       opts.field_classes)
 
             # make sure opts.fields doesn't specify an invalid field
-            none_model_fields = [k for k, v in six.iteritems(fields) if not v]
+            none_model_fields = [k for k, v in fields.items() if not v]
             missing_fields = (set(none_model_fields) -
                               set(new_class.declared_fields.keys()))
             if missing_fields:
@@ -457,7 +456,7 @@ class BaseModelForm(BaseForm):
     save.alters_data = True
 
 
-class ModelForm(six.with_metaclass(ModelFormMetaclass, BaseModelForm)):
+class ModelForm(BaseModelForm, metaclass=ModelFormMetaclass):
     pass
 
 

django/forms/widgets.py

@@ -11,13 +11,12 @@ from itertools import chain
 from django.conf import settings
 from django.forms.utils import to_current_timezone
 from django.templatetags.static import static
-from django.utils import datetime_safe, formats, six
+from django.utils import datetime_safe, formats
 from django.utils.dates import MONTHS
 from django.utils.encoding import force_str, force_text
 from django.utils.formats import get_format
 from django.utils.html import format_html, html_safe
 from django.utils.safestring import mark_safe
-from django.utils.six.moves import range
 from django.utils.translation import ugettext_lazy
 
 from .renderers import get_default_renderer
@@ -152,7 +151,7 @@ class MediaDefiningClass(type):
         return new_class
 
 
-class Widget(six.with_metaclass(MediaDefiningClass)):
+class Widget(metaclass=MediaDefiningClass):
     needs_multipart_form = False  # Determines does this widget need multipart form
     is_localized = False
     is_required = False

django/http/cookie.py

@@ -1,6 +1,5 @@
 import sys
-
-from django.utils.six.moves import http_cookies
+from http import cookies
 
 # Cookie pickling bug is fixed in Python 2.7.9 and Python 3.4.3+
 # http://bugs.python.org/issue22775
@@ -10,11 +9,11 @@ cookie_pickles_properly = (
 )
 
 if cookie_pickles_properly:
-    SimpleCookie = http_cookies.SimpleCookie
+    SimpleCookie = cookies.SimpleCookie
 else:
-    Morsel = http_cookies.Morsel
+    Morsel = cookies.Morsel
 
-    class SimpleCookie(http_cookies.SimpleCookie):
+    class SimpleCookie(cookies.SimpleCookie):
         if not cookie_pickles_properly:
             def __setitem__(self, key, value):
                 # Apply the fix from http://bugs.python.org/issue22775 where
@@ -41,5 +40,5 @@ def parse_cookie(cookie):
         key, val = key.strip(), val.strip()
         if key or val:
             # unquote using Python's algorithm.
-            cookiedict[key] = http_cookies._unquote(val)
+            cookiedict[key] = cookies._unquote(val)
     return cookiedict

django/http/multipartparser.py

@@ -8,6 +8,7 @@ import base64
 import binascii
 import cgi
 import sys
+from urllib.parse import unquote
 
 from django.conf import settings
 from django.core.exceptions import (
@@ -19,7 +20,6 @@ from django.core.files.uploadhandler import (
 from django.utils import six
 from django.utils.datastructures import MultiValueDict
 from django.utils.encoding import force_text
-from django.utils.six.moves.urllib.parse import unquote
 from django.utils.text import unescape_entities
 
 __all__ = ('MultiPartParser', 'MultiPartParserError', 'InputStreamExhausted')
@@ -312,7 +312,7 @@ class MultiPartParser(object):
                 handler.file.close()
 
 
-class LazyStream(six.Iterator):
+class LazyStream:
     """
     The LazyStream wrapper allows one to get and "unget" bytes from a stream.
 
@@ -429,7 +429,7 @@ class LazyStream(six.Iterator):
             )
 
 
-class ChunkIter(six.Iterator):
+class ChunkIter:
     """
     An iterable that will yield chunks of data. Given a file-like object as the
     constructor, this object will yield chunks of read operations from that
@@ -453,7 +453,7 @@ class ChunkIter(six.Iterator):
         return self
 
 
-class InterBoundaryIter(six.Iterator):
+class InterBoundaryIter:
     """
     A Producer that will iterate over boundaries.
     """
@@ -471,7 +471,7 @@ class InterBoundaryIter(six.Iterator):
             raise StopIteration()
 
 
-class BoundaryIter(six.Iterator):
+class BoundaryIter:
     """
     A Producer that is sensitive to boundaries.
 

django/http/request.py

@@ -3,6 +3,7 @@ import re
 import sys
 from io import BytesIO
 from itertools import chain
+from urllib.parse import quote, urlencode, urljoin, urlsplit
 
 from django.conf import settings
 from django.core import signing
@@ -17,9 +18,6 @@ from django.utils.encoding import (
     escape_uri_path, force_bytes, force_str, iri_to_uri,
 )
 from django.utils.http import is_same_domain, limited_parse_qsl
-from django.utils.six.moves.urllib.parse import (
-    quote, urlencode, urljoin, urlsplit,
-)
 
 RAISE_ERROR = object()
 host_validation_re = re.compile(r"^([a-z0-9.-]+|\[[a-f0-9]*:[a-f0-9\.:]+\])(:\d+)?$")
@@ -431,14 +429,14 @@ class QueryDict(MultiValueDict):
 
     def __copy__(self):
         result = self.__class__('', mutable=True, encoding=self.encoding)
-        for key, value in six.iterlists(self):
+        for key, value in self.lists():
             result.setlist(key, value)
         return result
 
     def __deepcopy__(self, memo):
         result = self.__class__('', mutable=True, encoding=self.encoding)
         memo[id(self)] = result
-        for key, value in six.iterlists(self):
+        for key, value in self.lists():
             result.setlist(copy.deepcopy(key, memo), copy.deepcopy(value, memo))
         return result
 

django/http/response.py

@@ -4,20 +4,19 @@ import re
 import sys
 import time
 from email.header import Header
+from http.client import responses
+from urllib.parse import urlparse
 
 from django.conf import settings
 from django.core import signals, signing
 from django.core.exceptions import DisallowedRedirect
 from django.core.serializers.json import DjangoJSONEncoder
 from django.http.cookie import SimpleCookie
-from django.utils import six, timezone
+from django.utils import timezone
 from django.utils.encoding import (
     force_bytes, force_str, force_text, iri_to_uri,
 )
 from django.utils.http import cookie_date
-from django.utils.six.moves import map
-from django.utils.six.moves.http_client import responses
-from django.utils.six.moves.urllib.parse import urlparse
 
 _charset_from_content_type_re = re.compile(r';\s*charset=(?P<charset>[^\s;]+)', re.I)
 
@@ -26,7 +25,7 @@ class BadHeaderError(ValueError):
     pass
 
 
-class HttpResponseBase(six.Iterator):
+class HttpResponseBase:
     """
     An HTTP response base class with dictionary-accessed headers.
 

django/middleware/common.py

@@ -1,5 +1,6 @@
 import re
 import warnings
+from urllib.parse import urlparse
 
 from django import http
 from django.conf import settings
@@ -11,7 +12,6 @@ from django.utils.cache import (
 )
 from django.utils.deprecation import MiddlewareMixin, RemovedInDjango21Warning
 from django.utils.encoding import force_text
-from django.utils.six.moves.urllib.parse import urlparse
 
 
 class CommonMiddleware(MiddlewareMixin):

django/middleware/csrf.py

@@ -7,6 +7,7 @@ against request forgeries from other sites.
 import logging
 import re
 import string
+from urllib.parse import urlparse
 
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
@@ -16,8 +17,6 @@ from django.utils.crypto import constant_time_compare, get_random_string
 from django.utils.deprecation import MiddlewareMixin
 from django.utils.encoding import force_text
 from django.utils.http import is_same_domain
-from django.utils.six.moves import zip
-from django.utils.six.moves.urllib.parse import urlparse
 
 logger = logging.getLogger('django.security.csrf')
 

django/template/defaulttags.py

@@ -7,7 +7,7 @@ from datetime import datetime
 from itertools import cycle as itertools_cycle, groupby
 
 from django.conf import settings
-from django.utils import six, timezone
+from django.utils import timezone
 from django.utils.encoding import force_text
 from django.utils.html import conditional_escape, format_html
 from django.utils.lorem_ipsum import paragraphs, words
@@ -521,8 +521,7 @@ class WithNode(Node):
         return "<WithNode>"
 
     def render(self, context):
-        values = {key: val.resolve(context) for key, val in
-                  six.iteritems(self.extra_context)}
+        values = {key: val.resolve(context) for key, val in self.extra_context.items()}
         with context.push(**values):
             return self.nodelist.render(context)
 

django/template/loader_tags.py

@@ -3,7 +3,6 @@ import posixpath
 import warnings
 from collections import defaultdict
 
-from django.utils import six
 from django.utils.deprecation import RemovedInDjango21Warning
 from django.utils.safestring import mark_safe
 
@@ -25,7 +24,7 @@ class BlockContext(object):
         self.blocks = defaultdict(list)
 
     def add_blocks(self, blocks):
-        for name, block in six.iteritems(blocks):
+        for name, block in blocks.items():
             self.blocks[name].insert(0, block)
 
     def pop(self, name):
@@ -183,7 +182,7 @@ class IncludeNode(Node):
                     cache[template_name] = template
             values = {
                 name: var.resolve(context)
-                for name, var in six.iteritems(self.extra_context)
+                for name, var in self.extra_context.items()
             }
             if self.isolated_context:
                 return template.render(context.new(values))

django/templatetags/static.py

@@ -1,8 +1,9 @@
+from urllib.parse import quote, urljoin
+
 from django import template
 from django.apps import apps
 from django.utils.encoding import iri_to_uri
 from django.utils.html import conditional_escape
-from django.utils.six.moves.urllib.parse import quote, urljoin
 
 register = template.Library()
 

django/test/client.py

@@ -6,6 +6,7 @@ import sys
 from copy import copy
 from importlib import import_module
 from io import BytesIO
+from urllib.parse import urljoin, urlparse, urlsplit
 
 from django.conf import settings
 from django.core.handlers.base import BaseHandler
@@ -24,7 +25,6 @@ from django.utils.encoding import force_bytes, force_str, uri_to_iri
 from django.utils.functional import SimpleLazyObject, curry
 from django.utils.http import urlencode
 from django.utils.itercompat import is_iterable
-from django.utils.six.moves.urllib.parse import urljoin, urlparse, urlsplit
 
 __all__ = ('Client', 'RedirectCycleError', 'RequestFactory', 'encode_file', 'encode_multipart')
 

django/test/runner.py

@@ -8,6 +8,7 @@ import textwrap
 import unittest
 import warnings
 from importlib import import_module
+from io import StringIO
 
 from django.core.management import call_command
 from django.db import connections
@@ -18,7 +19,6 @@ from django.test.utils import (
 )
 from django.utils.datastructures import OrderedSet
 from django.utils.deprecation import RemovedInDjango21Warning
-from django.utils.six import StringIO
 
 try:
     import tblib.pickling_support

django/test/selenium.py

@@ -4,7 +4,6 @@ from contextlib import contextmanager
 
 from django.test import LiveServerTestCase, tag
 from django.utils.module_loading import import_string
-from django.utils.six import with_metaclass
 from django.utils.text import capfirst
 
 
@@ -54,7 +53,7 @@ class SeleniumTestCaseBase(type(LiveServerTestCase)):
 
 
 @tag('selenium')
-class SeleniumTestCase(with_metaclass(SeleniumTestCaseBase, LiveServerTestCase)):
+class SeleniumTestCase(LiveServerTestCase, metaclass=SeleniumTestCaseBase):
     implicit_wait = 10
 
     @classmethod

django/test/testcases.py

@@ -9,6 +9,8 @@ from contextlib import contextmanager
 from copy import copy
 from functools import wraps
 from unittest.util import safe_repr
+from urllib.parse import unquote, urljoin, urlparse, urlsplit
+from urllib.request import url2pathname
 
 from django.apps import apps
 from django.conf import settings
@@ -31,13 +33,8 @@ from django.test.utils import (
     CaptureQueriesContext, ContextList, compare_xml, modify_settings,
     override_settings,
 )
-from django.utils import six
 from django.utils.decorators import classproperty
 from django.utils.encoding import force_text
-from django.utils.six.moves.urllib.parse import (
-    unquote, urljoin, urlparse, urlsplit,
-)
-from django.utils.six.moves.urllib.request import url2pathname
 from django.views.static import serve
 
 __all__ = ('TestCase', 'TransactionTestCase',
@@ -921,7 +918,7 @@ class TransactionTestCase(SimpleTestCase):
                          inhibit_post_migrate=inhibit_post_migrate)
 
     def assertQuerysetEqual(self, qs, values, transform=repr, ordered=True, msg=None):
-        items = six.moves.map(transform, qs)
+        items = map(transform, qs)
         if not ordered:
             return self.assertEqual(Counter(items), Counter(values), msg=msg)
         values = list(values)

django/test/utils.py

@@ -6,6 +6,7 @@ import time
 import warnings
 from contextlib import contextmanager
 from functools import wraps
+from io import StringIO
 from types import SimpleNamespace
 from unittest import TestCase, skipIf, skipUnless
 from xml.dom.minidom import Node, parseString
@@ -21,7 +22,6 @@ from django.db.models.options import Options
 from django.template import Template
 from django.test.signals import setting_changed, template_rendered
 from django.urls import get_script_prefix, set_script_prefix
-from django.utils import six
 from django.utils.decorators import available_attrs
 from django.utils.encoding import force_str
 from django.utils.translation import deactivate
@@ -728,7 +728,7 @@ def captured_output(stream_name):
     Note: This function and the following ``captured_std*`` are copied
           from CPython's ``test.support`` module."""
     orig_stdout = getattr(sys, stream_name)
-    setattr(sys, stream_name, six.StringIO())
+    setattr(sys, stream_name, StringIO())
     try:
         yield getattr(sys, stream_name)
     finally:
@@ -840,7 +840,7 @@ class LoggingCaptureMixin(object):
     def setUp(self):
         self.logger = logging.getLogger('django')
         self.old_stream = self.logger.handlers[0].stream
-        self.logger_output = six.StringIO()
+        self.logger_output = StringIO()
         self.logger.handlers[0].stream = self.logger_output
 
     def tearDown(self):

django/urls/base.py

@@ -1,8 +1,8 @@
 from threading import local
+from urllib.parse import urlsplit, urlunsplit
 
 from django.utils.encoding import force_text, iri_to_uri
 from django.utils.functional import lazy
-from django.utils.six.moves.urllib.parse import urlsplit, urlunsplit
 from django.utils.translation import override
 
 from .exceptions import NoReverseMatch, Resolver404

django/utils/_os.py

@@ -5,7 +5,6 @@ from os.path import abspath, dirname, join, normcase, sep
 from django.core.exceptions import SuspiciousFileOperation
 from django.utils.encoding import force_text
 
-
 abspathu = abspath
 
 

django/utils/autoreload.py

@@ -35,12 +35,13 @@ import sys
 import time
 import traceback
 
+import _thread
+
 from django.apps import apps
 from django.conf import settings
 from django.core.signals import request_finished
 from django.utils import six
 from django.utils._os import npath
-from django.utils.six.moves import _thread as thread
 
 # This import does nothing, but it's necessary to avoid some race conditions
 # in the threading module. See http://code.djangoproject.com/ticket/2330 .
@@ -293,7 +294,7 @@ def restart_with_reloader():
 
 def python_reloader(main_func, args, kwargs):
     if os.environ.get("RUN_MAIN") == "true":
-        thread.start_new_thread(main_func, args, kwargs)
+        _thread.start_new_thread(main_func, args, kwargs)
         try:
             reloader_thread()
         except KeyboardInterrupt:
@@ -311,7 +312,7 @@ def python_reloader(main_func, args, kwargs):
 
 def jython_reloader(main_func, args, kwargs):
     from _systemrestart import SystemRestart
-    thread.start_new_thread(main_func, args)
+    _thread.start_new_thread(main_func, args)
     while True:
         if code_changed():
             raise SystemRestart

django/utils/crypto.py

@@ -10,7 +10,6 @@ import time
 
 from django.conf import settings
 from django.utils.encoding import force_bytes
-from django.utils.six.moves import range
 
 # Use the system PRNG if possible
 try:

django/utils/datastructures.py

@@ -1,8 +1,6 @@
 import copy
 from collections import OrderedDict
 
-from django.utils import six
-
 
 class OrderedSet(object):
     """
@@ -189,7 +187,7 @@ class MultiValueDict(dict):
 
     def lists(self):
         """Yields (key, list) pairs."""
-        return six.iteritems(super(MultiValueDict, self))
+        return iter(super(MultiValueDict, self).items())
 
     def values(self):
         """Yield the last value on every key list."""
@@ -218,7 +216,7 @@ class MultiValueDict(dict):
                         self.setlistdefault(key).append(value)
                 except TypeError:
                     raise ValueError("MultiValueDict.update() takes either a MultiValueDict or dictionary")
-        for key, value in six.iteritems(kwargs):
+        for key, value in kwargs.items():
             self.setlistdefault(key).append(value)
 
     def dict(self):

django/utils/dateparse.py

@@ -8,7 +8,6 @@
 import datetime
 import re
 
-from django.utils import six
 from django.utils.timezone import get_fixed_timezone, utc
 
 date_re = re.compile(
@@ -60,7 +59,7 @@ def parse_date(value):
     """
     match = date_re.match(value)
     if match:
-        kw = {k: int(v) for k, v in six.iteritems(match.groupdict())}
+        kw = {k: int(v) for k, v in match.groupdict().items()}
         return datetime.date(**kw)
 
 
@@ -78,7 +77,7 @@ def parse_time(value):
         kw = match.groupdict()
         if kw['microsecond']:
             kw['microsecond'] = kw['microsecond'].ljust(6, '0')
-        kw = {k: int(v) for k, v in six.iteritems(kw) if v is not None}
+        kw = {k: int(v) for k, v in kw.items() if v is not None}
         return datetime.time(**kw)
 
 
@@ -105,7 +104,7 @@ def parse_datetime(value):
             if tzinfo[0] == '-':
                 offset = -offset
             tzinfo = get_fixed_timezone(offset)
-        kw = {k: int(v) for k, v in six.iteritems(kw) if v is not None}
+        kw = {k: int(v) for k, v in kw.items() if v is not None}
         kw['tzinfo'] = tzinfo
         return datetime.datetime(**kw)
 
@@ -127,5 +126,5 @@ def parse_duration(value):
             kw['microseconds'] = kw['microseconds'].ljust(6, '0')
         if kw.get('seconds') and kw.get('microseconds') and kw['seconds'].startswith('-'):
             kw['microseconds'] = '-' + kw['microseconds']
-        kw = {k: float(v) for k, v in six.iteritems(kw) if v is not None}
+        kw = {k: float(v) for k, v in kw.items() if v is not None}
         return sign * datetime.timedelta(**kw)

django/utils/encoding.py

@@ -2,11 +2,10 @@ import codecs
 import datetime
 import locale
 from decimal import Decimal
-from urllib.parse import unquote_to_bytes
+from urllib.parse import quote, unquote_to_bytes
 
 from django.utils import six
 from django.utils.functional import Promise
-from django.utils.six.moves.urllib.parse import quote
 
 
 class DjangoUnicodeDecodeError(UnicodeDecodeError):

django/utils/feedgenerator.py

@@ -22,11 +22,11 @@ For definitions of the different versions of RSS, see:
 http://web.archive.org/web/20110718035220/http://diveintomark.org/archives/2004/02/04/incompatible-rss
 """
 import datetime
+from io import StringIO
+from urllib.parse import urlparse
 
 from django.utils import datetime_safe
 from django.utils.encoding import force_text, iri_to_uri
-from django.utils.six import StringIO
-from django.utils.six.moves.urllib.parse import urlparse
 from django.utils.timezone import utc
 from django.utils.xmlutils import SimplerXMLGenerator
 

django/utils/functional.py

@@ -2,8 +2,6 @@ import copy
 import operator
 from functools import total_ordering, wraps
 
-from django.utils import six
-
 
 # You can't trivially replace this with `functools.partial` because this binds
 # to classes and returns bound instances, whereas functools.partial (on
@@ -193,7 +191,7 @@ def keep_lazy(*resultclasses):
 
         @wraps(func)
         def wrapper(*args, **kwargs):
-            for arg in list(args) + list(six.itervalues(kwargs)):
+            for arg in list(args) + list(kwargs.values()):
                 if isinstance(arg, Promise):
                     break
             else:

django/utils/html.py

@@ -1,15 +1,14 @@
 """HTML utilities suitable for global use."""
 
 import re
+from urllib.parse import (
+    parse_qsl, quote, unquote, urlencode, urlsplit, urlunsplit,
+)
 
-from django.utils import six
 from django.utils.encoding import force_str, force_text
 from django.utils.functional import keep_lazy, keep_lazy_text
 from django.utils.http import RFC3986_GENDELIMS, RFC3986_SUBDELIMS
 from django.utils.safestring import SafeData, SafeText, mark_safe
-from django.utils.six.moves.urllib.parse import (
-    parse_qsl, quote, unquote, urlencode, urlsplit, urlunsplit,
-)
 from django.utils.text import normalize_newlines
 
 from .html_parser import HTMLParseError, HTMLParser
@@ -93,7 +92,7 @@ def format_html(format_string, *args, **kwargs):
     of str.format or % interpolation to build up small HTML fragments.
     """
     args_safe = map(conditional_escape, args)
-    kwargs_safe = {k: conditional_escape(v) for (k, v) in six.iteritems(kwargs)}
+    kwargs_safe = {k: conditional_escape(v) for (k, v) in kwargs.items()}
     return mark_safe(format_string.format(*args_safe, **kwargs_safe))