此教程摘自光城的这篇文章:
两天入门Python基础(附代码实现)
names="zhang Gu Xiang Xu"
names=["zhang","Gu","Xiang","Xu"]
names2=names.copy()
print(names,names2) # 此时names2与names指向相同
names[2]="大张"
print(names,names2) # 此时names改变,names2不变
names=[1,2,3,4,["zhang","Gu"],5]
print(names)
names2=names.copy()
names[3]="斯"
names[4][0]="张改"
print(names,names2) # copy为浅copy,第一层copy不变,后面的嵌套全部都变,修改names2与names都一样
import copy
# 浅copy与深copy
# 浅copy与深copy区别就是浅copy只copy一层,而深copy就是完全克隆
names=[1,2,3,4,["zhang","Gu"],5]
# names2=copy.copy(names) # 这个跟列表的浅copy一样
names2=copy.deepcopy(names) #深copy
names[3]="斯"
names[4][0]="张改"
print(names,names2)
总结:深拷贝是完整拷贝,不受外界干扰,而浅拷贝存在共用关系。