Got rid of old __cmp__methods replaced by rich comparison.

The __cmp__ methods are unsupported in Python 3.
_doctest.py has been left untouched because it is likely it will
not be migrated to Python 3.

django/contrib/gis/geos/mutable_list.py

@@ -8,6 +8,9 @@ See also http://www.aryehleib.com/MutableLists.html
 
 Author: Aryeh Leib Taurog.
 """
+from django.utils.functional import total_ordering
+
+@total_ordering
 class ListMixin(object):
     """
     A base class which provides complete list interface.
@@ -143,20 +146,28 @@ class ListMixin(object):
                 self.extend(cache)
         return self
 
-    def __cmp__(self, other):
-        'cmp'
+    def __eq__(self, other):
+        for i in range(len(self)):
+            try:
+                c = self[i] == other[i]
+            except IndexError:
+                # must be other is shorter
+                return False
+            if not c:
+                return False
+        return True
+
+    def __lt__(self, other):
         slen = len(self)
         for i in range(slen):
             try:
-                c = cmp(self[i], other[i])
+                c = self[i] < other[i]
             except IndexError:
                 # must be other is shorter
-                return 1
-            else:
-                # elements not equal
-                if c: return c
-
-        return cmp(slen, len(other))
+                return False
+            if c:
+                return c
+        return slen < len(other)
 
     ### Public list interface Methods ###
     ## Non-mutating ##

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

@@ -1,5 +1,7 @@
-from django.utils.safestring import mark_safe
 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
+
 
 class GEvent(object):
     """
@@ -166,6 +168,7 @@ class GPolyline(GOverlayBase):
         return '%s, "%s", %s, %s' % (self.latlngs, self.color, self.weight, self.opacity)
 
 
+@total_ordering
 class GIcon(object):
     """
     Creates a GIcon object to pass into a Gmarker object.
@@ -231,8 +234,11 @@ class GIcon(object):
         self.iconanchor = iconanchor
         self.infowindowanchor = infowindowanchor
 
-    def __cmp__(self, other):
-        return cmp(self.varname, other.varname)
+    def __eq__(self, other):
+        return self.varname == other.varname
+
+    def __lt__(self, other):
+        return self.varname < other.varname
     
     def __hash__(self):
         # XOR with hash of GIcon type so that hash('varname') won't 

django/contrib/gis/measure.py

@@ -38,6 +38,8 @@ and Geoff Biggs' PhD work on dimensioned units for robotics.
 __all__ = ['A', 'Area', 'D', 'Distance']
 from decimal import Decimal
 
+from django.utils.functional import total_ordering
+
 class MeasureBase(object):
     def default_units(self, kwargs):
         """
@@ -84,6 +86,7 @@ class MeasureBase(object):
         else:
             raise Exception('Could not find a unit keyword associated with "%s"' % unit_str)
 
+@total_ordering
 class Distance(MeasureBase):
     UNITS = {
         'chain' : 20.1168,
@@ -178,9 +181,15 @@ class Distance(MeasureBase):
     def __str__(self):
         return '%s %s' % (getattr(self, self._default_unit), self._default_unit)
 
-    def __cmp__(self, other):
+    def __eq__(self, other):
         if isinstance(other, Distance):
-            return cmp(self.m, other.m)
+            return self.m == other.m
+        else:
+            return NotImplemented
+
+    def __lt__(self, other):
+        if isinstance(other, Distance):
+            return self.m < other.m
         else:
             return NotImplemented
 
@@ -244,6 +253,7 @@ class Distance(MeasureBase):
     def __nonzero__(self):
         return bool(self.m)
 
+@total_ordering
 class Area(MeasureBase):
     # Getting the square units values and the alias dictionary.
     UNITS = dict([('sq_%s' % k, v ** 2) for k, v in Distance.UNITS.items()])
@@ -267,9 +277,15 @@ class Area(MeasureBase):
     def __str__(self):
         return '%s %s' % (getattr(self, self._default_unit), self._default_unit)
 
-    def __cmp__(self, other):
+    def __eq__(self, other):
         if isinstance(other, Area):
-            return cmp(self.sq_m, other.sq_m)
+            return self.sq_m == other.sq_m
+        else:
+            return NotImplemented
+
+    def __lt__(self, other):
+        if isinstance(other, Area):
+            return self.sq_m < other.sq_m
         else:
             return NotImplemented
 

django/dispatch/saferef.py

@@ -156,11 +156,11 @@ class BoundMethodWeakref(object):
         """Whether we are still a valid reference"""
         return self() is not None
 
-    def __cmp__( self, other ):
+    def __eq__(self, other):
         """Compare with another reference"""
         if not isinstance(other, self.__class__):
-            return cmp( self.__class__, type(other) )
-        return cmp( self.key, other.key)
+            return self.__class__ == type(other)
+        return self.key == other.key
     
     def __call__(self):
         """Return a strong reference to the bound method

django/utils/functional.py

@@ -58,6 +58,7 @@ def lazy(func, *resultclasses):
     function is evaluated on every access.
     """
 
+    @total_ordering
     class __proxy__(Promise):
         """
         Encapsulate a function call and act as a proxy for methods that are
@@ -124,17 +125,23 @@ def lazy(func, *resultclasses):
         def __str_cast(self):
             return str(func(*self.__args, **self.__kw))
 
-        def __cmp__(self, rhs):
+        def __cast(self):
             if self._delegate_str:
-                s = str(func(*self.__args, **self.__kw))
+                return self.__str_cast()
             elif self._delegate_unicode:
-                s = unicode(func(*self.__args, **self.__kw))
+                return self.__unicode_cast()
             else:
-                s = func(*self.__args, **self.__kw)
-            if isinstance(rhs, Promise):
-                return -cmp(rhs, s)
-            else:
-                return cmp(s, rhs)
+                return func(*self.__args, **self.__kw)
+
+        def __eq__(self, other):
+            if isinstance(other, Promise):
+                other = other.__cast()
+            return self.__cast() == other
+
+        def __lt__(self, other):
+            if isinstance(other, Promise):
+                other = other.__cast()
+            return self.__cast() < other
 
         def __mod__(self, rhs):
             if self._delegate_str: