To operate an empty key will result in operating the bucket

[yonoho]

in file oss2/api.py: Line 2753

    def __do_object(self, method, key, **kwargs):
        return self._do(method, self.bucket_name, key, **kwargs)

    def __do_bucket(self, method, **kwargs):
        return self._do(method, self.bucket_name, '', **kwargs)

As it shows, when calling __do_object() with key='', it equals calling __do_bucket(), and there aren't any checks before that。if the client calls bucket.delete_object(key='') accidentally, the whole bucket may be deleted, which is really dangerous.