#!/usr/bin/env python # -*- coding:utf-8 -*- import copy # 字符串和数字浅拷贝等价于n2 = n1 n1 = 123 n2 = copy.copy(n1) print(id(n1)) print(id(n2)) n1 = ['aa', 'bb', ['cc', 'dd']] n2 = copy.copy(n1) # 相同 print(id(n1[2])) print(id(n2[2])) assert (id(n1[2]) == id(n2[2])) n2 = copy.deepcopy(n1) # 不同 print(id(n1[2])) print(id(n2[2])) assert not (id(n1[2]) == id(n2[2]))