import inspect

def print_id(obj):
    print "{} => {}".format(id(obj), obj)

def getmember(obj, name):
    #members = dict(inspect.getmembers(obj))
    #return members[name]
    return [member 
            for _name, member in inspect.getmembers(obj) 
            if name == _name][0]

class Foo(object):
    def bar(self): pass

foo = Foo()

print_id(foo.bar)
print_id(getattr(foo, 'bar'))
print_id(getmember(foo, 'bar'))