Python - as a shallow copy of a list object multiplication

Run the following code

 1 # !/usr/bin/env python3
 2 # -*- coding=utf-8 -*-
 3 
 4 temp_a = [[0]*2]*3
 5 temp_b = [[0]*2 for i in range(3)]
 6 
 7 print(temp_a)
 8 print(temp_b)
 9 
10 print(id(temp_a[0]) == id(temp_a[1]))
11 print(id(temp_b[0]) == id(temp_b[1]))
12 
13 temp_a[0][0] = 1
14 temp_b[0][0] = 1
15 
16 print(temp_a)
17 print(temp_b)

You will get wonderful results

1 [[0, 0], [0, 0], [0, 0]]
2 [[0, 0], [0, 0], [0, 0]]
3 True
4 False
5 [[1, 0], [1, 0], [1, 0]]
6 [[1, 0], [0, 0], [0, 0]]

Key output on line 5, line 13 to reflect the modification of the program.

As can be seen the object list multiplication shallow copy, pay special attention in use.