_dummy_thread --- Drop-in replacement for the _thread module

Source code: Lib/_dummy_thread.py

3.7 版後已棄用: Python now always has threading enabled. Please use _thread (or, better, threading) instead.

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This module provides a duplicate interface to the _thread module. It was meant to be imported when the _thread module was not provided on a platform.

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.