New submission from wh1te r4bb1t <wh1te.r4b...@protonmail.com>:
Here is a code highlighting a very strange behavior. This has been noticed in python 3.7, 3.8 and 3.9.0a2 def function(input_list, a='x'): [input_list[i].append(a) for i in range(len(input_list))] return input_list list1 = [[0], [0], [0]] list2 = [[0]] * 3 list1 == list2 # return True function(list1) # return [[0, 'x'], [0, 'x'], [0, 'x']] function(list2) # return [[0, 'x', 'x', 'x'], [0, 'x', 'x', 'x'], [0, 'x', 'x', 'x']] list1 == list2 # return false ---------- messages: 360351 nosy: wh1te r4bb1t priority: normal severity: normal status: open title: Objects equal (assertEqual return True) but behave differently type: behavior versions: Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue39403> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com