Patch #1601678: move intern() to sys.intern().
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index b74a440..101a6e4 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -264,6 +264,32 @@
#endif
+
+static PyObject *
+sys_intern(PyObject *self, PyObject *args)
+{
+ PyObject *s;
+ if (!PyArg_ParseTuple(args, "S:intern", &s))
+ return NULL;
+ if (!PyString_CheckExact(s)) {
+ PyErr_SetString(PyExc_TypeError,
+ "can't intern subclass of string");
+ return NULL;
+ }
+ Py_INCREF(s);
+ PyString_InternInPlace(&s);
+ return s;
+}
+
+PyDoc_STRVAR(intern_doc,
+"intern(string) -> string\n\
+\n\
+``Intern'' the given string. This enters the string in the (global)\n\
+table of interned strings whose purpose is to speed up dictionary lookups.\n\
+Return the string itself or the previously interned string object with the\n\
+same value.");
+
+
/*
* Cached interned string objects used for calling the profile and
* trace functions. Initialized by trace_init().
@@ -772,6 +798,7 @@
{"getwindowsversion", (PyCFunction)sys_getwindowsversion, METH_NOARGS,
getwindowsversion_doc},
#endif /* MS_WINDOWS */
+ {"intern", sys_intern, METH_VARARGS, intern_doc},
#ifdef USE_MALLOPT
{"mdebug", sys_mdebug, METH_VARARGS},
#endif