Mark Dickinson added the comment: @andy.chugunov: tuples are immutable in the sense that you can't put a new object into a tuple or remove objects from a tuple. That doesn't mean that tuples can't contain mutable objects, or prevent you from mutating the objects inside a tuple.
So the append method call is fine: it's not modifying the tuple itself (the tuple still has references to exactly the same objects both before and after the append call); it's merely mutating one the objects inside the tuple. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue17973> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
