attrdict and namedtuple moved to lib

--HG--
branch : aspn

src/attrdict.py

@@ -5,11 +5,25 @@
 # http://code.activestate.com/recipes/473786/
 # http://groups.google.com/group/comp.lang.python/browse_thread/thread/fa88bba7184d9431
 
+"""
+Looks fine as long as nobody uses an existing method name as a dictionary key:
+
+py> d = AttrDict({'name':'value'})
+py> d.items()
+[('name', 'value')]
+py> d = AttrDict({'items': [1,2,3]})
+py> d.items()
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+TypeError: 'list' object is not callable
+
+(I should have included a test case for this issue too).
+Of course, if this doesn't matter in your application, go ahead and use it. Just be aware of the problem. 
+"""
+
+
 class AttrDict(dict):
-    """A dict whose items can also be accessed as member variables.
-    
-    A dictionary with attribute-style access. It maps attribute access to
-    the real dictionary.  """
+    """A dict whose items can also be accessed as member variables."""
     def __init__(self, *args, **kwargs):
         dict.__init__(self, *args, **kwargs)
         self.__dict__ = self