add hg and python

sys/lib/python/idlelib/Delegator.py

@@ -0,0 +1,33 @@
+class Delegator:
+
+    # The cache is only used to be able to change delegates!
+
+    def __init__(self, delegate=None):
+        self.delegate = delegate
+        self.__cache = {}
+
+    def __getattr__(self, name):
+        attr = getattr(self.delegate, name) # May raise AttributeError
+        setattr(self, name, attr)
+        self.__cache[name] = attr
+        return attr
+
+    def resetcache(self):
+        for key in self.__cache.keys():
+            try:
+                delattr(self, key)
+            except AttributeError:
+                pass
+        self.__cache.clear()
+
+    def cachereport(self):
+        keys = self.__cache.keys()
+        keys.sort()
+        print keys
+
+    def setdelegate(self, delegate):
+        self.resetcache()
+        self.delegate = delegate
+
+    def getdelegate(self):
+        return self.delegate