--- a/Modules/operator.c	Fri Apr 20 14:37:17 2012 +0200
+++ b/Modules/operator.c	Fri Apr 20 19:46:38 2012 +0200
@@ -155,6 +155,54 @@
     return result;
 }
 
+static PyObject*
+build_class(PyObject *s, PyObject *args, PyObject *kw)
+{
+    static char *kwlist[] = {"name", "bases", "kwds", "exec_body", 0};
+    PyObject *name;
+    PyObject *bases = NULL;
+    PyObject *kwds = NULL;
+    PyObject *exec_body = NULL;
+    PyObject *cls;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kw, "U|O!O!O:build_class", kwlist,
+                                     &name,
+                                     &PyTuple_Type, &bases,
+                                     &PyDict_Type, &kwds,
+                                     &exec_body)) {
+        return NULL;
+    }
+
+    if (exec_body != NULL) {
+        if (exec_body == Py_None) {
+            exec_body = NULL;
+        }
+        else if (!PyCallable_Check(exec_body)) {
+            PyErr_SetString(PyExc_TypeError, "build_class: exec_body is not a callable");
+            return NULL;
+        }
+    }
+
+    if (bases == NULL) {
+        bases = PyTuple_New(0);
+        if (bases == NULL) {
+            return NULL;
+        }
+    }
+    else {
+        Py_INCREF(bases);
+    }
+
+    cls = _PyType_BuildClass(exec_body, name, bases, kwds);
+    Py_DECREF(bases);
+    return cls;
+}
+
+PyDoc_STRVAR(build_class_doc,
+             "build_class(name, bases=(), kwds={}, exec_body=None) -> cls\n\
+             \n\
+             Dynamically create a class object.");
+
 #undef spam1
 #undef spam2
 #undef spam1o
@@ -227,6 +275,8 @@
 spam2(gt,__gt__, "gt(a, b) -- Same as a>b.")
 spam2(ge,__ge__, "ge(a, b) -- Same as a>=b.")
 
+{"build_class", (PyCFunction)build_class, METH_VARARGS | METH_KEYWORDS, build_class_doc},
+
     {NULL,              NULL}           /* sentinel */
 
 };