16.4. dummy_threading — 可直接替代 threading 模块。

源代码： Lib/dummy_threading.py

---

This module provides a duplicate interface to the threading module. It is meant to be imported when the thread module is not provided on a platform.

Suggested usage is:

try:
    import threading as _threading
except ImportError:
    import dummy_threading as _threading

Be careful to not use this module where deadlock might occur from a thread being created that blocks waiting for another thread to be created. This often occurs with blocking I/O.