python – 为什么PyImport_Import无法从当前目录加载模块?
作者:互联网
我正在尝试运行embedding example并且我无法从当前工作目录加载模块,除非我将其显式添加到sys.path然后它可以工作:
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
解决方法:
您需要调用PySys_SetArgv(int argc,char ** argv,int updatepath)才能使相对导入生效.如果updatepath为0,这将把正在执行的脚本的路径添加到sys.path(有关更多信息,请参阅docs).
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;
}
标签:python,linux,python-2-7,python-embedding 来源: https://codeday.me/bug/20190928/1829663.html