如何从C访问一个Python全局变量？ [英] How to access a Python global variable from C?

问题描述

我有一个Python脚本一些全局变量。在脚本调用成C的一些功能 - 它可以设置这些变量之一，而在C和如果是，如何

？

我AP preciate，这不是一个很不错的设计摆在首位，但我需要做一个小的变化对现有code，我不想走上现有的大规模的重构脚本。

解决方案

我不是一个Python大师，但我发现这个问题有意思，所以我用Google搜索左右。 这是在蟒蛇嵌入API的第一主打 - 帮助？

  

如果属性属于全局
  一个模块的范围，那么你可以使用
  PyImport_AddModule来获得一个句柄
  到模块的对象。例如，如果
  你想获得的价值
  整数主要命名模块
  取得foobar，你会做以下内容：

 的PyObject * M = PyImport_AddModule（__ main__）;
*的PyObject V = PyObject_GetAttrString（男，FOOBAR）;INT foobar的= PyInt_AsLong（V）;Py_DECREF（五）;
 

I have some global variables in a Python script. Some functions in that script call into C - is it possible to set one of those variables while in C and if so, how?

I appreciate that this isn't a very nice design in the first place, but I need to make a small change to existing code, I don't want to embark on major refactoring of existing scripts.

解决方案

I'm not a python guru, but I found this question interesting so I googled around. This was the first hit on "python embedding API" - does it help?

If the attributes belong to the global scope of a module, then you can use "PyImport_AddModule" to get a handle to the module object. For example, if you wanted to get the value of an integer in the main module named "foobar", you would do the following:

PyObject *m = PyImport_AddModule("__main__");
PyObject *v = PyObject_GetAttrString(m,"foobar");

int foobar = PyInt_AsLong(v);

Py_DECREF(v);

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