Overloading methods of subtype example.

CVS patchset: 6838
CVS date: 2003/05/12 22:28:28

python/sub.py

@@ -0,0 +1,28 @@
+class Factory(object):
+    def __init__(self, false_self, method_name):
+	self.false_self = false_self
+	self.method_name = method_name
+
+    def __call__(self, val):
+	lself = long(self.false_self)
+	iself = int(self.false_self)
+	lm = long.__getattribute__(lself, self.method_name)
+	im = int.__getattribute__(iself, self.method_name)
+	la = lm(long(val))
+	ia = im(int(val))
+	print "  Comparing", la, ia
+	assert la == ia
+	return la
+
+class Bar(long):
+    def __getattribute__(self, name):
+	print "__getattribute__ ~%s~" % name
+	if name not in ('__add__', '__sub__', ):
+	    return long.getattr(self, name)
+        return Factory(self, name)
+
+a1 = Bar(1)
+a2 = Bar(2)
+print a1.__add__(a2)
+print "Done"
+print a1 + a2