PyImport_ImportModule, PyModule_GetDict

[Brian Lloyd]

> If I understand this correctly, the equivalent of doing this:
> 
> >>> import mymodule
> >>> dir(mymodule)
> 
> is sort of this, in the C API:
> 
> PyObject *mod = PyImport_ImportModule("mymodule");
>  PyObject *myDict = PyModule_GetDict(mod);
> 
> Q:  what is the C API equivalent of this:
> 
> >>> from mymodule import *
> >>> dir()
> 
> 
> --Randy

Ok, I'll bite - though I'll note that the 'from module import *'
form is often considered evil :^) Here's an offhand and untested
way you might try to do it:


int fromModuleImportStar(PyObject *modsrc, PyObject *modto) {
  PyObject *srcdict=PyModule_GetDict(modsrc);
  PyObject *tgtdict=PyModule_GetDict(modtgt);
  PyObject *keys=PyDict_Keys(modsrc);
  PyObject *key=NULL;
  PyObject *val=NULL;
  int size=PyList_Size(keys);
  int n=0;

  while (n < size) {

    /* I _think_ that all the references are borrowed here,
       so we don't need to INCREF/DECREF...
    */
    key=PyList_GetItem(keys, n);

    /* should check this for errors */
    PyDict_SetItem(tgtdict, key, PyDict_GetItem(srcdict, key));

    n++;
  }
  PY_DECREF(srcdict);
  PY_DECREF(tgtdict);
  PY_DECREF(keys);
  return 0;
}

Hope this helps!

Brian Lloyd        brian at digicool.com
Software Engineer  540.371.6909              
Digital Creations  http://www.digicool.com