python - 使用 threading.Lock 作为上下文管理器

Question

在 threading 的文档中它说的模块:

All of the objects provided by this module that have acquire() and release() methods can be used as context managers for a with statement. The acquire() method will be called when the block is entered, and release() will be called when the block is exited.

请问是阻塞调用还是非阻塞调用？

Answer 1

从查看 CPython source ，它似乎是使用默认参数调用的，这意味着处于阻塞模式。

您要特别查看的方法是 __enter__() ，它在 with block 的开头调用，并且 __exit__() ，在最后调用。