Python3 --- 深浅拷贝

# 浅拷贝
a = [11,22,33]

b = a

print(id(a)) #内存地址13817864
print(id(b)) #内存地址13817864


# 深拷贝
import copy
c = copy.deepcopy(a)

print(id(a)) #内存地址13817864
print(id(c)) #内存地址14278728

从下面的代码可以看出，copy.deepcopy()深拷贝是递归依次拷贝引用

import copy
a = [11,22,33]
b = [44,55,66]
c = [a,b]

d = c
print(id(c))
print(id(d))

e = copy.deepcopy(c)
print(id(e))
a.append(44)

print(c[0])
print(e[0])

从下面的代码可以看出，copy.copy()深拷贝是只拷贝当前的引用，不会递归拷贝当前引用中的引用

import copy
a = [11,22,33]
b = [44,55,66]
c = [a,b]

d = c
print(id(c))
print(id(c))

e = copy.copy(c)
print(id(e))
a.append(44)

print(c[0])
print(e[0])

注意：如果c是元祖类型，由于元祖是不可变类型，那么将是浅拷贝