python - 为什么Python解释器不是线程安全的？

Question

GIL 锁定核心，使线程无法并行运行。为什么会这样呢？ 网上关于这方面的信息很少。

Answer 1

从非常基本的角度来说，GIL 可以阻止内存损坏，如果没有 GIL，多个线程可能会同时执行，从而导致不可预测的输出。

In CPython, the global interpreter lock, or GIL, is a mutex that protects access to Python objects, preventing multiple threads from executing Python bytecodes at once. This lock is necessary mainly because CPython's memory management is not thread-safe. (However, since the GIL exists, other features have grown to depend on the guarantees that it enforces.)

请参阅documentation

正如您将看到的，有些实现不使用 GIL，例如 Jython 和 IronPython。

还有一篇关于 Wikipedia that deals with this topic. 的非常有用的文章

A global interpreter lock (GIL) is a mutual-exclusion lock held by a programming language interpreter thread to avoid sharing code that is not thread-safe with other threads. In implementations with a GIL, there is always one GIL for each interpreter process.