mainobj.py

class Meta(type):
    def __getattr__(cls, key):
        return globals()[key]

    def __setattr__(cls, key, value):
        globals()[key] = value

    def hasattr_(cls, key, original = hasattr):
        if "hasattr" in cls.__dict__.keys(): #No recursion today
            return key in globals().keys()
        return original(cls, key)
    __builtins__.hasattr = hasattr_

class main(metaclass = Meta):
    pass

if __name__ == "__main__":
    main.foo = 10
    print(foo)
    print(hasattr(main, "bar"))