text: 
  /* Module object implementation */
  
  #include "Python.h"
  #include "structmember.h"
  
  typedef struct {
  	PyObject_HEAD
  	PyObject *md_dict;
  } PyModuleObject;
  
  static PyMemberDef module_members[] = {
  	{"__dict__", T_OBJECT, offsetof(PyModuleObject, md_dict), READONLY},
  	{0}
  };
  
  PyObject *
  PyModule_New(const char *name)
  {
  	PyModuleObject *m;
  	PyObject *nameobj;
  	m = PyObject_GC_New(PyModuleObject, &PyModule_Type);
  	if (m == NULL)
  		return NULL;
  	nameobj = PyString_FromString(name);
  	m->md_dict = PyDict_New();
  	if (m->md_dict == NULL || nameobj == NULL)
  		goto fail;
  	if (PyDict_SetItemString(m->md_dict, "__name__", nameobj) != 0)
  		goto fail;
  	if (PyDict_SetItemString(m->md_dict, "__doc__", Py_None) != 0)
  		goto fail;
  	if (PyDict_SetItemString(m->md_dict, "__package__", Py_None) != 0)
  		goto fail;
  	Py_DECREF(nameobj);
  	PyObject_GC_Track(m);
  	return (PyObject *)m;
  
   fail:
  	Py_XDECREF(nameobj);
  	Py_DECREF(m);
  	return NULL;
  }
  
  PyObject *
  PyModule_GetDict(PyObject *m)
  {
  	PyObject *d;
  	if (!PyModule_Check(m)) {
  		PyErr_BadInternalCall();
  		return NULL;
  	}
  	d = ((PyModuleObject *)m) -> md_dict;
  	if (d == NULL)
  		((PyModuleObject *)m) -> md_dict = d = PyDict_New();
  	return d;
  }
  
  char *
  PyModule_GetName(PyObject *m)
  {
  	PyObject *d;
  	PyObject *nameobj;
  	if (!PyModule_Check(m)) {
  		PyErr_BadArgument();
  		return NULL;
  	}
  	d = ((PyModuleObject *)m)->md_dict;
  	if (d == NULL ||
  	    (nameobj = PyDict_GetItemString(d, "__name__")) == NULL ||
  	    !PyString_Check(nameobj))
  	{
  		PyErr_SetString(PyExc_SystemError, "nameless module");
  		return NULL;
  	}
  	return PyString_AsString(nameobj);
  }
  
  char *
  PyModule_GetFilename(PyObject *m)
  {
  	PyObject *d;
  	PyObject *fileobj;
  	if (!PyModule_Check(m)) {
  		PyErr_BadArgument();
  		return NULL;
  	}
  	d = ((PyModuleObject *)m)->md_dict;
  	if (d == NULL ||
  	    (fileobj = PyDict_GetItemString(d, "__file__")) == NULL ||
  	    !PyString_Check(fileobj))
  	{
  		PyErr_SetString(PyExc_SystemError, "module filename missing");
  		return NULL;
  	}
  	return PyString_AsString(fileobj);
  }
  
  void
  _PyModule_Clear(PyObject *m)
  {
  	/* To make the execution order of destructors for global
  	   objects a bit more predictable, we first zap all objects
  	   whose name starts with a single underscore, before we clear
  	   the entire dictionary.  We zap them by replacing them with
  	   None, rather than deleting them from the dictionary, to
  	   avoid rehashing the dictionary (to some extent). */
  
  	Py_ssize_t pos;
  	PyObject *key, *value;
  	PyObject *d;
  
  	d = ((PyModuleObject *)m)->md_dict;
  	if (d == NULL)
  		return;
  
  	/* First, clear only names starting with a single underscore */
  	pos = 0;
  	while (PyDict_Next(d, &pos, &key, &value)) {
  		if (value != Py_None && PyString_Check(key)) {
  			char *s = PyString_AsString(key);
  			if (s[0] == '_' && s[1] != '_') {
  				if (Py_VerboseFlag > 1)
  				    PySys_WriteStderr("#   clear[1] %s\n", s);
  				PyDict_SetItem(d, key, Py_None);
  			}
  		}
  	}
  
  	/* Next, clear all names except for __builtins__ */
  	pos = 0;
  	while (PyDict_Next(d, &pos, &key, &value)) {
  		if (value != Py_None && PyString_Check(key)) {
  			char *s = PyString_AsString(key);
  			if (s[0] != '_' || strcmp(s, "__builtins__") != 0) {
  				if (Py_VerboseFlag > 1)
  				    PySys_WriteStderr("#   clear[2] %s\n", s);
  				PyDict_SetItem(d, key, Py_None);
  			}
  		}
  	}
  
  	/* Note: we leave __builtins__ in place, so that destructors
  	   of non-global objects defined in this module can still use
  	   builtins, in particularly 'None'. */
  
  }
  
  /* Methods */
  
  static int
  module_init(PyModuleObject *m, PyObject *args, PyObject *kwds)
  {
  	static char *kwlist[] = {"name", "doc", NULL};
  	PyObject *dict, *name = Py_None, *doc = Py_None;
  	if (!PyArg_ParseTupleAndKeywords(args, kwds, "S|O:module.__init__",
                                           kwlist, &name, &doc))
  		return -1;
  	dict = m->md_dict;
  	if (dict == NULL) {
  		dict = PyDict_New();
  		if (dict == NULL)
  			return -1;
  		m->md_dict = dict;
  	}
  	if (PyDict_SetItemString(dict, "__name__", name) < 0)
  		return -1;
  	if (PyDict_SetItemString(dict, "__doc__", doc) < 0)
  		return -1;
  	return 0;
  }
  
  static void
  module_dealloc(PyModuleObject *m)
  {
  	PyObject_GC_UnTrack(m);
  	if (m->md_dict != NULL) {
  		_PyModule_Clear((PyObject *)m);
  		Py_DECREF(m->md_dict);
  	}
  	Py_TYPE(m)->tp_free((PyObject *)m);
  }
  
  static PyObject *
  module_repr(PyModuleObject *m)
  {
  	char *name;
  	char *filename;
  
  	name = PyModule_GetName((PyObject *)m);
  	if (name == NULL) {
  		PyErr_Clear();
  		name = "?";
  	}
  	filename = PyModule_GetFilename((PyObject *)m);
  	if (filename == NULL) {
  		PyErr_Clear();
  		return PyString_FromFormat("<module '%s' (built-in)>", name);
  	}
  	return PyString_FromFormat("<module '%s' from '%s'>", name, filename);
  }
  
  /* We only need a traverse function, no clear function: If the module
     is in a cycle, md_dict will be cleared as well, which will break
     the cycle. */
  static int
  module_traverse(PyModuleObject *m, visitproc visit, void *arg)
  {
  	Py_VISIT(m->md_dict);
  	return 0;
  }
  
  PyDoc_STRVAR(module_doc,
  "module(name[, doc])\n\
  \n\
  Create a module object.\n\
  The name must be a string; the optional doc argument can have any type.");
  
  PyTypeObject PyModule_Type = {
  	PyVarObject_HEAD_INIT(&PyType_Type, 0)
  	"module",				/* tp_name */
  	sizeof(PyModuleObject),			/* tp_size */
  	0,					/* tp_itemsize */
  	(destructor)module_dealloc,		/* tp_dealloc */
  	0,					/* tp_print */
  	0,					/* tp_getattr */
  	0,					/* tp_setattr */
  	0,					/* tp_compare */
  	(reprfunc)module_repr,			/* tp_repr */
  	0,					/* tp_as_number */
  	0,					/* tp_as_sequence */
  	0,					/* tp_as_mapping */
  	0,					/* tp_hash */
  	0,					/* tp_call */
  	0,					/* tp_str */
  	PyObject_GenericGetAttr,		/* tp_getattro */
  	PyObject_GenericSetAttr,		/* tp_setattro */
  	0,					/* tp_as_buffer */
  	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
  		Py_TPFLAGS_BASETYPE,		/* tp_flags */
  	module_doc,				/* tp_doc */
  	(traverseproc)module_traverse,		/* tp_traverse */
  	0,					/* tp_clear */
  	0,					/* tp_richcompare */
  	0,					/* tp_weaklistoffset */
  	0,					/* tp_iter */
  	0,					/* tp_iternext */
  	0,					/* tp_methods */
  	module_members,				/* tp_members */
  	0,					/* tp_getset */
  	0,					/* tp_base */
  	0,					/* tp_dict */
  	0,					/* tp_descr_get */
  	0,					/* tp_descr_set */
  	offsetof(PyModuleObject, md_dict),	/* tp_dictoffset */
  	(initproc)module_init,			/* tp_init */
  	PyType_GenericAlloc,			/* tp_alloc */
  	PyType_GenericNew,			/* tp_new */
  	PyObject_GC_Del,		        /* tp_free */
  };
  