Ids: a list of ids that we want to return

def get_users_batch(self, ids):
    """
    Ids: a list of ids that we want to return
    """
    # Allowed maximum number of ids is 50
    assert len(ids) <= 50
    ids_ = ','.join(ids)
    url = _USERS_BATCH.format(c_api=_C_API_BEGINNING,
                                              api=_API_VERSION,
                                              ids=ids_,
					      at=self.access_token)
    return _get_request(url)