深拷贝 deep copy 和 浅拷贝 shallow copy
浅拷贝 shallow copy
浅拷贝是指在复制过程中,只复制一层变量,不会复制深层
变量绑定的对象的复制过程
如:
L = [3.1, 3.2]
L1 = [1, 2, L]
L2 = L1.copy() # 浅拷贝
print(L1) # [1, 2, [3.1, 3.2]]
print(L2) # [1, 2, [3.1, 3.2]]
L2[2][0] = 3.14
print(L1) # [1, 2, [3.14, 3.2]]
print(L2) # [1, 2, [3.14, 3.2]]
深拷贝 deep copy
如:
import copy # 导入复制模块
L = [3.1, 3.2]
L1 = [1, 2, L]
L2 = copy.deepcopy(L1) # 深拷贝
print(L1) # [1, 2, [3.1, 3.2]]
print(L2) # [1, 2, [3.1, 3.2]]
L2[2][0] = 3.14
print(L1) # [1, 2, [3.1, 3.2]]
print(L2) # [1, 2, [3.14, 3.2]]
[深浅拷贝的区别](https://www.cnblogs.com/huangbiquan/p/7795152.html)