[issue45437] Assignment to a list of dictionary wrong

Zachary Ware 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:

[issue45437] Assignment to a list of dictionary wrong

New submission from Xin Sheng Zhou : >>> details = [{}]*4 >>> details [{}, {}, {}, {}] >>> details[1]['A']=5 >>> details [{'A': 5}, {'A': 5}, {'A': 5}, {'A': 5}] >>> -- messages: 403679 nosy: xinshengzhou priority: normal severity: normal status: open title: Assignment to a list of dict