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      1 /* Example of embedding Python in another program */
      2 
      3 #include "Python.h"
      4 
      5 void initxyzzy(void); /* Forward */
      6 
      7 main(int argc, char **argv)
      8 {
      9     /* Pass argv[0] to the Python interpreter */
     10     Py_SetProgramName(argv[0]);
     11 
     12     /* Initialize the Python interpreter.  Required. */
     13     Py_Initialize();
     14 
     15     /* Add a static module */
     16     initxyzzy();
     17 
     18     /* Define sys.argv.  It is up to the application if you
     19        want this; you can also leave it undefined (since the Python
     20        code is generally not a main program it has no business
     21        touching sys.argv...)
     22 
     23        If the third argument is true, sys.path is modified to include
     24        either the directory containing the script named by argv[0], or
     25        the current working directory.  This can be risky; if you run
     26        an application embedding Python in a directory controlled by
     27        someone else, attackers could put a Trojan-horse module in the
     28        directory (say, a file named os.py) that your application would
     29        then import and run.
     30     */
     31     PySys_SetArgvEx(argc, argv, 0);
     32 
     33     /* Do some application specific code */
     34     printf("Hello, brave new world\n\n");
     35 
     36     /* Execute some Python statements (in module __main__) */
     37     PyRun_SimpleString("import sys\n");
     38     PyRun_SimpleString("print sys.builtin_module_names\n");
     39     PyRun_SimpleString("print sys.modules.keys()\n");
     40     PyRun_SimpleString("print sys.executable\n");
     41     PyRun_SimpleString("print sys.argv\n");
     42 
     43     /* Note that you can call any public function of the Python
     44        interpreter here, e.g. call_object(). */
     45 
     46     /* Some more application specific code */
     47     printf("\nGoodbye, cruel world\n");
     48 
     49     /* Exit, cleaning up the interpreter */
     50     Py_Exit(0);
     51     /*NOTREACHED*/
     52 }
     53 
     54 /* A static module */
     55 
     56 /* 'self' is not used */
     57 static PyObject *
     58 xyzzy_foo(PyObject *self, PyObject* args)
     59 {
     60     return PyInt_FromLong(42L);
     61 }
     62 
     63 static PyMethodDef xyzzy_methods[] = {
     64     {"foo",             xyzzy_foo,      METH_NOARGS,
     65      "Return the meaning of everything."},
     66     {NULL,              NULL}           /* sentinel */
     67 };
     68 
     69 void
     70 initxyzzy(void)
     71 {
     72     PyImport_AddModule("xyzzy");
     73     Py_InitModule("xyzzy", xyzzy_methods);
     74 }
     75