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https://nikos7am.com/posts/mutable-default-arguments/ Avoid using an empty list as a default argument to a function A very common error in Python is the use of an empty list as a default argument to a function. This is not the right way to do it and can cause unwanted behavior. See for example below: def append_to_list(element, list_to_append=[]): list_to_append.append( nikos7am.com 함수 인자로 리스트를 ..