def _get_token(self, oauth_request, token_type=TOKEN_ACCESS):
        """Try to find the token for the provided request token key."""
        token_field = oauth_request.get_parameter('oauth_token')
        token = self.datastore.lookup_token(token_type, token_field)
        if not token:
            raise oauth2.Error((token_type, token_field) % 'Invalid %s token: %s')
        return token
dataset/ETHPy150Open benoitc/dj-webmachine/webmachine/auth/oauth.py/OAuthServer._get_token/swapped operands of `%`