added attribute-like access to tuple and dict

--HG--
branch : aspn

src/attrdict.py

@@ -0,0 +1,33 @@
+# http://code.activestate.com/recipes/473786/
+
+class AttrDict(dict):
+    """A dictionary with attribute-style access. It maps attribute access to
+    the real dictionary.  """
+    def __init__(self, init={}):
+        dict.__init__(self, init)
+
+    def __getstate__(self):
+        return self.__dict__.items()
+
+    def __setstate__(self, items):
+        for key, val in items:
+            self.__dict__[key] = val
+
+    def __repr__(self):
+        return "%s(%s)" % (self.__class__.__name__, dict.__repr__(self))
+
+    def __setitem__(self, key, value):
+        return super(AttrDict, self).__setitem__(key, value)
+
+    def __getitem__(self, name):
+        return super(AttrDict, self).__getitem__(name)
+
+    def __delitem__(self, name):
+        return super(AttrDict, self).__delitem__(name)
+
+    __getattr__ = __getitem__
+    __setattr__ = __setitem__
+
+    def copy(self):
+        ch = AttrDict(self)
+        return ch