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def append_value(value, container=[]): container.append(value) return container result1 = append_value(1) result2 = append_value(2) result3 = append_value(3, []) print(result1, result2, result3)
[1] [2] [3]
[3] [3] [3]
[1] [1, 2] [3]
[1, 2] [1, 2] [3]