python - 没有使用 Python/C API 的名为 ctypes 的模块

Question

我有PythonCode.py:

import os, ctypes
print "ctypes are imported"

和CCode.c:

...
PySys_SetPath(path_to_PythonCode);
PyObject *pModule = PyImport_ImportModule("PythonCode");
if (!pModule) {
  PyErr_Print();
  return;
}
...

PyErr_Print() 打印:

Traceback (most recent call last):   File ".../PythonCode.py", line 1,
  in <module> import os, ctypes
ImportError: No module named ctypes

在终端中执行Python代码显示ctypes确实存在:

$ python --version
Python 2.7.1
$ python PythonCode.py
ctypes are imported

为什么Python/C API无法导入ctypes？

Answer 1

您用单个路径替换了默认的 sys.path 列表。相反，您可以插入新路径:

PyObject *sys_path, *path;

sys_path = PySys_GetObject("path");
if (sys_path == NULL || !PyList_Check(sys_path)) {   
    /* ZOMG! That's so wrong... */
    return;
}
path = PyString_FromString(path_to_PythonCode);
PyList_Insert(sys_path, 0, path);
Py_DECREF(path);