ctarn <i...@ctarn.io> added the comment:
In the code, each item of ls = [[0], [1], [2],...] has an owner pointing to d, which is a Tree inheriting from collections.UserList. When `d[0] = a`, and `a.owner = d`, and `_ = list(d[0:1])` is called, a.owner will be changed to d[0:1]. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue39110> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
