import sys

class SomeClass(object):
    d = {}
    def __getitem__(self, k):
        print >> sys.stderr, "Calling __getitem__.."
        return self.d[k]
    def __setitem__(self, k, v):
        print >> sys.stderr, "Calling __setitem__.."
        self.d[k] = v
    def __delitem__(self, k):
        print >> sys.stderr, "Calling __delitem__.."
        del self.d[k]
    def __iter__(self):
        print >> sys.stderr, "Calling __iter__.."
        return self.d.iterkeys()
    def __contains__(self, item):
        print >> sys.stderr, "Calling __contains__.."
        return item in self.d
    def func(self):
        print >> sys.stderr, "Calling func"

sc = SomeClass()
print "func()"
sc.func()
print "foo => bar"
sc["foo"] = "bar"
print "baz => zanzibar"
sc["baz"] = "zanzibar"

for k in sc:
    print "key:", k
    print "val:", sc[k]

del sc["foo"]
print "Got foo?"
assert "foo" not in sc
if "baz" in sc:
    print sc["baz"]