How to compile simple python embeded program using distutils

Question

Here is my code:

from distutils.msvc9compiler import MSVCCompiler

target_python_file = "main.py"
ccode = """#include <Python.h>

int
main(int argc, char *argv[])
{
  PyObject* PyFileObject;
  putenv("PYTHONPATH=lib");
  putenv("PYTHONHOME=.");
  Py_SetProgramName(argv[0]);
  Py_Initialize();
  PyFileObject = PyFile_FromString("%s", "r");
  PyRun_SimpleFileEx(PyFile_AsFile(PyFileObject), "%s", 1);
  Py_Finalize();
  return 0;
}
""" % (target_python_file, target_python_file)

with open("main.c","w") as main:
    main.write(ccode)

compiler = MSVCCompiler()
compiler.compile(["main.c"],include_dirs=["C:/Python27/include"])
compiler.link("",["main.obj"],"python_launcher.exe",libraries=["python27"], library_dirs=["C:/Python27/libs"])

When I run this, python_launcher.exe appears, however, when I try to run it, I get not a valid win32 application error.

I can compile same code using visaul c++ 2008 and it works, but I want to utilize distutils for this, because I want it to figure out configuration options for compiler.

Debug

I tried to open created executable in WinDebug, but I couldn't open, because this happened:

Turkish part says it is not a valid Win32 application.

Answer 1

There are two modifications to your code to make it work :

1. Use link_executable to output a standalone executable (the compile.link() is useless, use the subfunctions instead).

    compiler.link_executable( ["main.obj"], #object "launch" , # strip the .exe extension, it will be added libraries=["python27"], library_dirs=["C:/Python27/libs"] ) 

   At this point you should get this error message :

    X:\\dev\\null>python_launcher.exe ImportError: No module named site 

That's because you didn't entered the PYTHONPATH and PYTHONHOME variable env. in your main.c :

1. VARENV :

    putenv("PYTHONPATH=C:/Python27/Lib"); putenv("PYTHONHOME=C:/Python27"); 

It should work with those fixes (tested on Windows XP x86, Python 2.7, VSExpress 2008)

The whole code :

from distutils.msvc9compiler import MSVCCompiler

target_python_file = "main.py"
ccode = """#include <Python.h>

int
main(int argc, char *argv[])
{
  PyObject* PyFileObject;
  putenv("PYTHONPATH=C:/Python27/Lib");
  putenv("PYTHONHOME=C:/Python27");
  Py_SetProgramName(argv[0]);
  Py_Initialize();
  PyFileObject = PyFile_FromString("%s", "r");
  PyRun_SimpleFileEx(PyFile_AsFile(PyFileObject), "%s", 1);
  Py_Finalize();
  return 0;
}
""" % (target_python_file, target_python_file)

with open("main.c","w") as main:
    main.write(ccode)

compiler = MSVCCompiler()
compiler.compile(["main.c"],include_dirs=["C:/Python27/include"])
compiler.link_executable(["main.obj"],"launch", libraries=["python27"], library_dirs=["C:/Python27/libs"])