little bug

[Y75QMO]

def init(self, secret_int):

This line is missing some parethesis. It should be

    ~~if not isinstance(secret_int, (int, long)) and secret_int >= 0:~~
    if not (isinstance(secret_int, (int, long)) and secret_int >= 0):
        raise ValueError("Secret must be a non-negative integer.")
    self._secret = secret_int

[shea256]

Thanks for pointing this out. This code is no longer in the library. Closing this issue.