ctypes对共享库类和函数原型使用参数之间的区别？

Question

{{{cd3}{cd3}function prototypes，CFUNCTYPE，WINFUNCTYPE。我什么时候把use_errno=True传给哪一组？为什么？在

Answer 1

这是包含的bug tracker：

This patch adds new calling conventions to ctypes foreign functions by passing 'errno=True' or 'GetLastError=True' to the CDLL or WinDLL constructor.

If CDLL(..., errno=True) or WinDLL(..., errno=True) is used, the function objects available in the CDLL or WinDLL instance will set the C global errno to zero before the actual call, and attach the C global errno value after the call as 'errno' attribute to the function object. This attribute is stored in thread-local storage.