python深浅copy

# 在列表中有嵌套列表的情况下才会去讨论深浅复制

# 深复制
from copy import deepcopy

a = [11, 22, 33]
li = [1, 2, 3, a]
# 浅copy
li_cp = li.copy()
# 深copy
li_dpcp = deepcopy(li)

print(id(li[3]))
print(id(li_cp[3]))
print(id(li_dpcp[3]))

print("li", li)
print("浅复制", li_cp)
print("深复制", li_dpcp)
print(‘------------------------‘)
a.append(789)
print("li", li)
print("浅复制", li_cp)
print("深复制", li_dpcp)

1487939967240
1487939967240
1487940098760
li [1, 2, 3, [11, 22, 33]]
浅复制 [1, 2, 3, [11, 22, 33]]
深复制 [1, 2, 3, [11, 22, 33]]
------------------------
li [1, 2, 3, [11, 22, 33, 789]]
浅复制 [1, 2, 3, [11, 22, 33, 789]]
深复制 [1, 2, 3, [11, 22, 33]]