正确使用ctypes调用_Py_Mangle？ [英] Proper use of ctypes to call _Py_Mangle?

问题描述

坐在蘑菇上并考虑编写一个函数来实现Python名称处理算法的复杂性时，我的脑海中出现了一个惊人的更好的主意。为什么不使用已经为该语言编写的配方来实现这一目标呢？因此，我从书包中拉出 ctypes 来帮助自己，并执行了 ctypes.pythonapi._Py_Mangle（'Demo'，'__test'）。瞧，突然出现了一个错误，提示 OSError：异常：读取0x00000A65646F00A8 的访问冲突，没有再多解释这个难题了。

While sitting on a mushroom and contemplating the intricacies of inscribing a function to implement Python's name mangling algorithm, a stupendously better idea came into my noggin. Why not use the recipe already crafted into the language to accomplish such a goal? So I pulled ctypes out of my satchel to help with the endeavor and executed ctypes.pythonapi._Py_Mangle('Demo', '__test'). Lo and behold, an error appeared out of thin air saying OSError: exception: access violation reading 0x00000A65646F00A8 and did not bother to explain the conundrum any more than that.

与解释器的完整交互如下：

The full interaction with the interpreter is as follows:

Python 3.4.2 (v3.4.2:ab2c023a9432, Oct  6 2014, 22:16:31) [MSC v.1600 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import ctypes
>>> ctypes.pythonapi._Py_Mangle('Demo', '__test')
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    ctypes.pythonapi._Py_Mangle('Demo', '__test')
OSError: exception: access violation reading 0x00000A65646F00A8

有人知道要成功调用mangling函数需要进行哪些更改吗？

Does anyone know what needs to be changed in order to call the mangling function successfully?

推荐答案

感谢 eryksun 的评论，问题的答案非常简单：

Thanks to comments by eryksun, the answer to the problem is rather simple:

>>> from ctypes import pythonapi, py_object
>>> py_mangle = pythonapi._Py_Mangle
>>> py_mangle.argtypes = py_object, py_object
>>> py_mangle.restype = py_object
>>> py_mangle('Demo', '__test')
'_Demo__test'

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