Initial revision
diff --git a/Include/tupleobject.h b/Include/tupleobject.h
new file mode 100644
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--- /dev/null
+++ b/Include/tupleobject.h
@@ -0,0 +1,24 @@
+/* Tuple object interface */
+
+/*
+123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
+
+Another generally useful object type is an tuple of object pointers.
+This is a mutable type: the tuple items can be changed (but not their
+number). Out-of-range indices or non-tuple objects are ignored.
+
+*** WARNING *** settupleitem does not increment the new item's reference
+count, but does decrement the reference count of the item it replaces,
+if not nil. It does *decrement* the reference count if it is *not*
+inserted in the tuple. Similarly, gettupleitem does not increment the
+returned item's reference count.
+*/
+
+extern typeobject Tupletype;
+
+#define is_tupleobject(op) ((op)->ob_type == &Tupletype)
+
+extern object *newtupleobject PROTO((int size));
+extern int gettuplesize PROTO((object *));
+extern object *gettupleitem PROTO((object *, int));
+extern int settupleitem PROTO((object *, int, object *));