浅copy的用处

# s1 = [1,'alex','lda']
# s2 = s1.copy()
# s2[0] = 2
# print('s1---',s1)
# print('s2---',s2)

# a = [[1,2],3,4]

#浅copy只copy第一层
#用途： 银行的关联账户，一个账户取钱，另一个账户的钱也会减少
husband = ['xiaohu',123,[15000,9000]]

wife = husband.copy()
wife[0] = 'xiaopang'
wife[1] = 234
husband[2][1] -= 3000
print(wife)