Zachary Ware <zachary.w...@gmail.com> added the comment:
See https://docs.python.org/3/faq/programming.html#how-do-i-create-a-multidimensional-list Not quite the same example, but the underlying reason for what you're seeing is the same: each of the `dict` objects in `[{}] * 4` is actually the *same* dict object: >>> inner = {} >>> details = [inner] * 4 >>> details [{}, {}, {}, {}] >>> assert all(d is inner for d in details) >>> # Instead, do: >>> details = [{} for each in range(4)] >>> details [{}, {}, {}, {}] >>> details[1]['A'] = 5 >>> details [{}, {'A': 5}, {}, {}] ---------- nosy: +zach.ware resolution: -> not a bug stage: -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45437> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
