python 深浅拷贝

深浅拷贝
s = [23,'alex','ss','2s']

# s1 = [1,'alex','ss','s']

s2 = s.copy()

s2[0] = 1

print(s)
print(s2)

浅拷贝

s = [[1,2],'alex','alvin']

s3 = s.copy()

s3[0][1] = 3

print(s3)

print(s)

浅拷贝，只拷贝第一层  后面的共享
a = [[1, 2], 3, 4]

b2 = a
b = a.copy()

b2[1] = 'abc'

print(b2)
b[2] = '222'
print(a)
print(b)




应用银行关联账号
husband = ["xiaohu",123,[15000,9000]]
wife = husband.copy()
wife[0]="xiaopang"
wife[1] = "456"
print(wife)
husband[2][1] = 6000
print(wife)


深拷贝 克隆

import copy

xiaosan = copy.deepcopy(husband)

xiaosan[0] = "jinxin"
xiaosan[1] = 666
xiaosan[2][1] -= 1999

print(wife)
print(xiaosan)
print(husband)