1 files changed, 0 insertions, 100 deletions
diff --git a/Lib/UserDict.py b/Lib/UserDict.py
index bc05dfb628..cb8a826ff4 100644
--- a/Lib/UserDict.py
+++ b/Lib/UserDict.py
@@ -79,103 +79,3 @@ class UserDict:
 class IterableUserDict(UserDict):
     def __iter__(self):
         return iter(self.data)
-
-class DictMixin:
-    # Mixin defining all dictionary methods for classes that already have
-    # a minimum dictionary interface including getitem, setitem, delitem,
-    # and keys. Without knowledge of the subclass constructor, the mixin
-    # does not define __init__() or copy().  In addition to the four base
-    # methods, progressively more efficiency comes with defining
-    # __contains__(), __iter__(), and iteritems().
-
-    # XXX It would make more sense to expect __iter__ to be primitive.
-
-    # second level definitions support higher levels
-    def __iter__(self):
-        for k in self.keys():
-            yield k
-    def __contains__(self, key):
-        try:
-            value = self[key]
-        except KeyError:
-            return False
-        return True
-
-    # third level takes advantage of second level definitions
-    def iterkeys(self):
-        return self.__iter__()
-    def iteritems(self):
-        for k in self:
-            yield (k, self[k])
-
-    # fourth level uses definitions from lower levels
-    def itervalues(self):
-        for _, v in self.iteritems():
-            yield v
-    def values(self):
-        return [v for _, v in self.iteritems()]
-    def items(self):
-        return list(self.iteritems())
-    def clear(self):
-        for key in list(self.iterkeys()):
-            del self[key]
-    def setdefault(self, key, default=None):
-        try:
-            return self[key]
-        except KeyError:
-            self[key] = default
-        return default
-    def pop(self, key, *args):
-        if len(args) > 1:
-            raise TypeError("pop expected at most 2 arguments, got "
-                            + repr(1 + len(args)))
-        try:
-            value = self[key]
-        except KeyError:
-            if args:
-                return args[0]
-            raise
-        del self[key]
-        return value
-    def popitem(self):
-        try:
-            k, v = next(self.iteritems())
-        except StopIteration:
-            raise KeyError('container is empty')
-        del self[k]
-        return (k, v)
-    def update(self, other=None, **kwargs):
-        # Make progressively weaker assumptions about "other"
-        if other is None:
-            pass
-        elif hasattr(other, 'iteritems'):  # iteritems saves memory and lookups
-            for k, v in other.iteritems():
-                self[k] = v
-        elif hasattr(other, 'items'):  # items may also save memory and lookups
-            for k, v in other.items():
-                self[k] = v
-        elif hasattr(other, 'keys'):
-            for k in other.keys():
-                self[k] = other[k]
-        else:
-            for k, v in other:
-                self[k] = v
-        if kwargs:
-            self.update(kwargs)
-    def get(self, key, default=None):
-        try:
-            return self[key]
-        except KeyError:
-            return default
-    def __repr__(self):
-        return repr(dict(self.iteritems()))
-    def __eq__(self, other):
-        if isinstance(other, DictMixin):
-            other = dict(other.iteritems())
-        return dict(self.iteritems()) == other
-    def __ne__(self, other):
-        if isinstance(other, DictMixin):
-            other = dict(other.iteritems())
-        return dict(self.iteritems()) != other
-    def __len__(self):
-        return len(self.keys())