Embedded use vs. signal handlers

Enhancement

C signal handlers should be restore-able. Ideally you also want to call them from Python.

signal.signal(signal.SIGINT, signal.getsignal(signal.SIGINT))

This (ostensibly no-op) code raises TypeError when you use it in an embedded Python interpreter and a signal handler has been installed by the C (or whatever) side.

It shouldn't. My Python code wants to be able to restore the signal handler to its previous state when it's done.

Ideally my code should also be able to wrap that C handler, i.e. the result of getsignal() should be a callable from Python.

未指定源文件或测试。首先检查针对嵌入式 Python 解释器所描述的 signal.signal 和 signal.getsignal 行为，包括由 C 安装的处理程序；done 应允许恢复之前的处理程序，并在可行的情况下将其作为 Python 可以包装的可调用对象公开。