Python的Threading模块是建立在thread module基础上的一个模块，在threading模块中，暴露着许多thread模块的属性。比如threading._get_ident实际上就是thread.get_ident.
1 _start_new_thread = thread.start_new_thread 2 _allocate_lock = thread.allocate_lock 3 _get_ident = thread.get_ident 4 ThreadError = thread.error