_auth.py 文件源码

def with_scopes(credentials, scopes):
    """Scopes the credentials if necessary.

    Args:
        credentials (Union[
            google.auth.credentials.Credentials,
            oauth2client.client.Credentials]): The credentials to scope.
        scopes (Sequence[str]): The list of scopes.

    Returns:
        Union[google.auth.credentials.Credentials,
            oauth2client.client.Credentials]: The scoped credentials.
    """
    if HAS_GOOGLE_AUTH and isinstance(
            credentials, google.auth.credentials.Credentials):
        return google.auth.credentials.with_scopes_if_required(
            credentials, scopes)
    else:
        try:
            if credentials.create_scoped_required():
                return credentials.create_scoped(scopes)
            else:
                return credentials
        except AttributeError:
            return credentials