def _get_p_number(self, base_path, base_dir):
        if base_path and base_dir.startswith(base_path):
            return base_path.count('/') + 1
        else:
            return -1
Transactional asynchronous Delete operation.
dataset/ETHPy150Open reviewboard/rbtools/rbtools/clients/__init__.py/SCMClient._get_p_number--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/datastore/datastore_rpc.py/TransactionalConnection.async_delete