1 files changed, 167 insertions, 0 deletions
diff --git a/paste/util/UserDict24.py b/paste/util/UserDict24.py
new file mode 100644
index 0000000..e5b64f5
--- /dev/null
+++ b/paste/util/UserDict24.py
@@ -0,0 +1,167 @@
+"""A more or less complete user-defined wrapper around dictionary objects."""
+
+class UserDict:
+    def __init__(self, dict=None, **kwargs):
+        self.data = {}
+        if dict is not None:
+            if not hasattr(dict,'keys'):
+                dict = type({})(dict)   # make mapping from a sequence
+            self.update(dict)
+        if len(kwargs):
+            self.update(kwargs)
+    def __repr__(self): return repr(self.data)
+    def __cmp__(self, dict):
+        if isinstance(dict, UserDict):
+            return cmp(self.data, dict.data)
+        else:
+            return cmp(self.data, dict)
+    def __len__(self): return len(self.data)
+    def __getitem__(self, key): return self.data[key]
+    def __setitem__(self, key, item): self.data[key] = item
+    def __delitem__(self, key): del self.data[key]
+    def clear(self): self.data.clear()
+    def copy(self):
+        if self.__class__ is UserDict:
+            return UserDict(self.data)
+        import copy
+        data = self.data
+        try:
+            self.data = {}
+            c = copy.copy(self)
+        finally:
+            self.data = data
+        c.update(self)
+        return c
+    def keys(self): return self.data.keys()
+    def items(self): return self.data.items()
+    def iteritems(self): return self.data.iteritems()
+    def iterkeys(self): return self.data.iterkeys()
+    def itervalues(self): return self.data.itervalues()
+    def values(self): return self.data.values()
+    def has_key(self, key): return self.data.has_key(key)
+    def update(self, dict):
+        if isinstance(dict, UserDict):
+            self.data.update(dict.data)
+        elif isinstance(dict, type(self.data)):
+            self.data.update(dict)
+        else:
+            for k, v in dict.items():
+                self[k] = v
+    def get(self, key, failobj=None):
+        if not self.has_key(key):
+            return failobj
+        return self[key]
+    def setdefault(self, key, failobj=None):
+        if not self.has_key(key):
+            self[key] = failobj
+        return self[key]
+    def pop(self, key, *args):
+        return self.data.pop(key, *args)
+    def popitem(self):
+        return self.data.popitem()
+    def __contains__(self, key):
+        return key in self.data
+    def fromkeys(cls, iterable, value=None):
+        d = cls()
+        for key in iterable:
+            d[key] = value
+        return d
+    fromkeys = classmethod(fromkeys)
+
+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().
+
+    # second level definitions support higher levels
+    def __iter__(self):
+        for k in self.keys():
+            yield k
+    def has_key(self, key):
+        try:
+            value = self[key]
+        except KeyError:
+            return False
+        return True
+    def __contains__(self, key):
+        return self.has_key(key)
+
+    # third level takes advantage of second level definitions
+    def iteritems(self):
+        for k in self:
+            yield (k, self[k])
+    def iterkeys(self):
+        return self.__iter__()
+
+    # 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 self.keys():
+            del self[key]
+    def setdefault(self, key, default):
+        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 = self.iteritems().next()
+        except StopIteration:
+            raise KeyError, 'container is empty'
+        del self[k]
+        return (k, v)
+    def update(self, other):
+        # Make progressively weaker assumptions about "other"
+        if hasattr(other, 'iteritems'):  # iteritems saves memory and lookups
+            for k, v in other.iteritems():
+                self[k] = v
+        elif hasattr(other, '__iter__'): # iter saves memory
+            for k in other:
+                self[k] = other[k]
+        else:
+            for k in other.keys():
+                self[k] = other[k]
+    def get(self, key, default=None):
+        try:
+            return self[key]
+        except KeyError:
+            return default
+    def __repr__(self):
+        return repr(dict(self.iteritems()))
+    def __cmp__(self, other):
+        if other is None:
+            return 1
+        if isinstance(other, DictMixin):
+            other = dict(other.iteritems())
+        return cmp(dict(self.iteritems()), other)
+    def __len__(self):
+        return len(self.keys())
+    
+    def __nonzero__(self):
+        return bool(self.iteritems())