【今日代码段】--Day4

#深浅拷贝

import copy
a = [[1,2],"zhangw","haha"]
b = copy.copy(a)   #浅拷贝, 只复制第一次地址，固定地址复制，可变地址共享
b2 = copy.deepcopy(a)  #深拷贝，完全复制一份
choose = int(input("请选择深浅,1深，2浅："))

if choose == 2:
    b[1] = "zhangwei"
    b[0][1] = 22
    print("b=%s"%b)
    print("a=%s"%a)
else:
    b2[1] = "zhangwei"
    b2[0][1] = 22
    print("b2=%s"%b2)
    print("a=%s"%a)