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a = [ {"a": 1, "b": 2, "c": 3}, {"a": 4, "b": 5, "c": 6}, {"a": 7, "b": 8, "c": 9} ] import copy for item in a: new_item = copy.deepcopy(item) new_item["a"] = 10 del new_item["b"] # print(item) print(a)
