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1. Use Python objects from Objective-C with Python.h

   Download an Xcode demo project: CocoaPython.zip.

   #import
   #import
   
   int main (int argc, const char * argv[]) {
       NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
       
       /* initialization */
       
       Py_Initialize();
       
       PyObject *sysModule = PyImport_ImportModule("sys");
       PyObject *sysModuleDict = PyModule_GetDict(sysModule);
       PyObject *pathObject = PyDict_GetItemString(sysModuleDict, "path");
       PyObject_CallMethod(pathObject, "insert", "(is)", 0, "../../");
       
       Py_DECREF(sysModule); // borrowed reference
       
       /* import and instantiate Cat */
       
       // from Cat import *
       PyObject *CatModule = PyImport_ImportModule("Cat");
       
       // c = Cat()
       PyObject *Cat = PyDict_GetItemString(PyModule_GetDict(CatModule), "Cat");
       PyObject *cat = PyObject_CallObject(Cat, NULL);
       
       Py_DECREF(CatModule);
       Py_DECREF(Cat);
       
       /* use Cat instance methods */
       
       // c.scream()
       // c.set_name("charly")
       // c.print_family("jack", "cathy", 4)
       
       PyObject_CallMethod(cat,"scream",NULL);
       PyObject_CallMethod(cat,"set_name", "(s)", "charly");
       PyObject_CallMethod(cat,"print_family", "(ssi)", "jack", "cathy", 4);
       
       // c.is_asleep()
       PyObject *is_asleep = PyObject_CallMethod(cat,"is_asleep",NULL);
       BOOL isAsleep = (Py_True == is_asleep);
       Py_DECREF(is_asleep);
       NSLog(@"%d", isAsleep);
       
       // c.name()
       PyObject *name = PyObject_CallMethod(cat,"name",NULL);
       NSString *catName = [NSString stringWithCString: PyString_AsString(name)];
       Py_DECREF(name);
       NSLog(@"%@", catName);
       
       /* termination */
       
       Py_DECREF(cat);
       Py_Finalize();
       
       [pool release];
       return 0;
   }