Fixed bug where deffered classes were not being created properly,

implied classes with empty doc strings "inherited" bogus doc string
from Interface class, and interface class attribute not being set
correctly during init.

lib/python/Interface/iclass.py

@@ -33,9 +33,11 @@ class Interface:
         if attrs.has_key('__doc__'):
             if __doc__ is None: __doc__=attrs['__doc__']
             del attrs['__doc__']
-        self.__attrs=attrs
 
-        if __doc__ is not None: self.__doc__=__doc__
+        if __doc__ is not None:
+            self.__doc__=__doc__
+        else:
+            self.__doc__ = ""
 
         for k, v in attrs.items():
             if isinstance(v, Method):
@@ -47,6 +49,8 @@ class Interface:
                 raise Exceptions.InvalidInterface(
                     "Concrete attribute, %s" % k)
 
+        self.__attrs = attrs
+
     def deferred(self):
         """Return a defrered class corresponding to the interface
         """
@@ -64,7 +68,7 @@ class Interface:
 
     def __d(self, dict):
 
-        for k, v in self.__dict__.items():
+        for k, v in self.__attrs.items():
             if isinstance(v, Method) and not dict.has_key(k):
                 dict[k]=v