python – 为什么PyImport_Import无法从当前目录加载模块？

PyRun_SimpleString("import sys");
PyRun_SimpleString("sys.path.append(\".\")"); 

Python不应该在当前目录中查找模块吗？

Edit1：尝试导入模块：

Py_Initialize();
PyRun_SimpleString("import multiply"); 

它仍然失败,出现以下错误：

Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named multiply

Edit2：从sys.path docs：

If the script directory is not available (e.g. if the interpreter is
invoked interactively or if the script is read from standard input),
path[0] is the empty string, which directs Python to search modules
in the current directory first.

不确定它的含义是不可用的,但如果我打印sys.path [0]它不是空的：

/usr/lib/pymodules/python2.7

以下应该做的伎俩

#include <Python.h>

int
main(int argc, char *argv[])
{
  Py_SetProgramName(argv[0]);  /* optional but recommended */
  Py_Initialize();
  PySys_SetArgv(argc, argv); // must call this to get sys.argv and relative imports
  PyRun_SimpleString("import os, sys\n"
                     "print sys.argv, \"\\n\".join(sys.path)\n"
                     "print os.getcwd()\n"
                     "import thing\n" // import a relative module
                     "thing.printer()\n");
  Py_Finalize();
  return 0;
}