diff --git a/Include/iterobject.h b/Include/iterobject.h
new file mode 100644
index 0000000..38454a4
--- /dev/null
+++ b/Include/iterobject.h
@@ -0,0 +1,13 @@
+/* Iterators (the basic kind, over a sequence) */
+
+extern DL_IMPORT(PyTypeObject) PyIter_Type;
+
+#define PyIter_Check(op) ((op)->ob_type == &PyIter_Type)
+
+extern DL_IMPORT(PyObject *) PyIter_New(PyObject *);
+
+extern DL_IMPORT(PyTypeObject) PyCallIter_Type;
+
+#define PyCallIter_Check(op) ((op)->ob_type == &PyCallIter_Type)
+
+extern DL_IMPORT(PyObject *) PyCallIter_New(PyObject *, PyObject *);
diff --git a/Objects/iterobject.c b/Objects/iterobject.c
new file mode 100644
index 0000000..616417a
--- /dev/null
+++ b/Objects/iterobject.c
@@ -0,0 +1,188 @@
+/* Iterator objects */
+
+#include "Python.h"
+
+typedef struct {
+	PyObject_HEAD
+	long      it_index;
+	PyObject *it_seq;
+} iterobject;
+
+PyObject *
+PyIter_New(PyObject *seq)
+{
+	iterobject *it;
+	it = PyObject_NEW(iterobject, &PyIter_Type);
+	if (it == NULL)
+		return NULL;
+	it->it_index = 0;
+	Py_INCREF(seq);
+	it->it_seq = seq;
+	return (PyObject *)it;
+}
+static void
+iter_dealloc(iterobject *it)
+{
+	Py_DECREF(it->it_seq);
+	PyObject_DEL(it);
+}
+
+static PyObject *
+iter_next(iterobject *it, PyObject *args)
+{
+	PyObject *seq = it->it_seq;
+
+	if (PyList_Check(seq)) {
+		PyObject *item;
+		if (it->it_index >= PyList_GET_SIZE(seq)) {
+			PyErr_SetObject(PyExc_StopIteration, Py_None);
+			return NULL;
+		}
+		item = PyList_GET_ITEM(seq, it->it_index);
+		it->it_index++;
+		Py_INCREF(item);
+		return item;
+	}
+	else {
+		PyObject *result = PySequence_GetItem(seq, it->it_index++);
+		if (result == NULL &&
+		    PyErr_ExceptionMatches(PyExc_IndexError))
+			PyErr_SetObject(PyExc_StopIteration, Py_None);
+		return result;
+	}
+}
+
+static PyObject *
+iter_getiter(PyObject *it)
+{
+	Py_INCREF(it);
+	return it;
+}
+
+static PyMethodDef iter_methods[] = {
+	{"next",	(PyCFunction)iter_next,	METH_VARARGS,
+	 "it.next() -- get the next value, or raise StopIteration"},
+	{NULL,		NULL}		/* sentinel */
+};
+
+static PyObject *
+iter_getattr(iterobject *it, char *name)
+{
+	return Py_FindMethod(iter_methods, (PyObject *)it, name);
+}
+
+PyTypeObject PyIter_Type = {
+	PyObject_HEAD_INIT(&PyType_Type)
+	0,					/* ob_size */
+	"iterator",				/* tp_name */
+	sizeof(iterobject),			/* tp_basicsize */
+	0,					/* tp_itemsize */
+	/* methods */
+	(destructor)iter_dealloc, 		/* tp_dealloc */
+	0,					/* tp_print */
+	(getattrfunc)iter_getattr,		/* tp_getattr */
+	0,					/* tp_setattr */
+	0,					/* tp_compare */
+	0,					/* tp_repr */
+	0,					/* tp_as_number */
+	0,					/* tp_as_sequence */
+	0,					/* tp_as_mapping */
+	0,					/* tp_hash */
+	0,					/* tp_call */
+	0,					/* tp_str */
+	0,					/* tp_getattro */
+	0,					/* tp_setattro */
+	0,					/* tp_as_buffer */
+	Py_TPFLAGS_DEFAULT,			/* tp_flags */
+ 	0,					/* tp_doc */
+ 	0,					/* tp_traverse */
+ 	0,					/* tp_clear */
+	0,					/* tp_richcompare */
+	0,					/* tp_weaklistoffset */
+	(getiterfunc)iter_getiter,		/* tp_iter */
+};
+
+/* -------------------------------------- */
+
+typedef struct {
+	PyObject_HEAD
+	PyObject *it_callable;
+	PyObject *it_sentinel;
+} calliterobject;
+
+PyObject *
+PyCallIter_New(PyObject *callable, PyObject *sentinel)
+{
+	calliterobject *it;
+	it = PyObject_NEW(calliterobject, &PyCallIter_Type);
+	if (it == NULL)
+		return NULL;
+	Py_INCREF(callable);
+	it->it_callable = callable;
+	Py_INCREF(sentinel);
+	it->it_sentinel = sentinel;
+	return (PyObject *)it;
+}
+static void
+calliter_dealloc(calliterobject *it)
+{
+	Py_DECREF(it->it_callable);
+	Py_DECREF(it->it_sentinel);
+	PyObject_DEL(it);
+}
+static PyObject *
+calliter_next(calliterobject *it, PyObject *args)
+{
+	PyObject *result = PyObject_CallObject(it->it_callable, NULL);
+	if (result != NULL) {
+		if (PyObject_RichCompareBool(result, it->it_sentinel, Py_EQ)) {
+			PyErr_SetObject(PyExc_StopIteration, Py_None);
+			Py_DECREF(result);
+			result = NULL;
+		}
+	}
+	return result;
+}
+
+static PyMethodDef calliter_methods[] = {
+	{"next",	(PyCFunction)calliter_next,	METH_VARARGS,
+	 "it.next() -- get the next value, or raise StopIteration"},
+	{NULL,		NULL}		/* sentinel */
+};
+
+static PyObject *
+calliter_getattr(calliterobject *it, char *name)
+{
+	return Py_FindMethod(calliter_methods, (PyObject *)it, name);
+}
+
+PyTypeObject PyCallIter_Type = {
+	PyObject_HEAD_INIT(&PyType_Type)
+	0,					/* ob_size */
+	"callable-iterator",			/* tp_name */
+	sizeof(calliterobject),			/* tp_basicsize */
+	0,					/* tp_itemsize */
+	/* methods */
+	(destructor)calliter_dealloc, 		/* tp_dealloc */
+	0,					/* tp_print */
+	(getattrfunc)calliter_getattr,		/* tp_getattr */
+	0,					/* tp_setattr */
+	0,					/* tp_compare */
+	0,					/* tp_repr */
+	0,					/* tp_as_number */
+	0,					/* tp_as_sequence */
+	0,					/* tp_as_mapping */
+	0,					/* tp_hash */
+	0,					/* tp_call */
+	0,					/* tp_str */
+	0,					/* tp_getattro */
+	0,					/* tp_setattro */
+	0,					/* tp_as_buffer */
+	Py_TPFLAGS_DEFAULT,			/* tp_flags */
+ 	0,					/* tp_doc */
+ 	0,					/* tp_traverse */
+ 	0,					/* tp_clear */
+	0,					/* tp_richcompare */
+	0,					/* tp_weaklistoffset */
+	(getiterfunc)iter_getiter,		/* tp_iter */
+};