深拷贝和浅拷贝

'''
import copy
"""
深拷贝：源对象的子对象内存地址也一块拷贝，对源对象的子对象修改不会影响到深拷贝后的对象
浅拷贝：对源对象的子对象修改，会影响到浅拷贝后的对象
"""

# a = [1, 2, [3, 4]]
# b = a # 赋值
# print(id(a))
# print(id(b)) # b的内存地址和a一样
# a[2][0] = 4
# print(a) # [1, 2, [4, 4]]
# print(b) # [1, 2, [4, 4]]


# a = [1, 2, [3, 4]]
# c = copy.copy(a) # 浅拷贝
# print(id(a))
# print(id(c)) # c的内存地址和a不一样
# a[0] = 2 # 对源对象进行修改
# print(a) # [2, 2, [3, 4]]
# print(c) # [1, 2, [3, 4]]
# a[2][0] = 4 # 对源对象的子对象进行修改
# print(a) # [2, 2, [4, 4]]
# print(c) # [1, 2, [4, 4]]


# a = [1, 2, [3, 4]]
# d = copy.deepcopy(a) # 深拷贝
# print(id(a))
# print(id(d)) # d的内存地址和a不一样
# a[0] = 2 # 对源对象进行修改
# print(a) # [2, 2, [3, 4]]
# print(d) # [1, 2, [3, 4]]
# a[2][0] = 4 # 对源对象的子对象进行修改
# print(a) # [2, 2, [4, 4]]
# print(d) # [1, 2, [3, 4]]
'''