Python learning: Object-oriented

Python learning: Object-oriented

I. first look at a program

A = [1, 2, 3] B = a B [0] = 0 print bprint

Can you guess the execution result? Let's execute:

[0, 2, 3] [0, 2, 3]

Why? We only modified the values of the B set. Why does a change?

Because when B = a, objects a and B are actually directed to the same memory [1, 2, 3]

Ii. Let's take a look.

In the same way, what if I modify the value of?

A = [1, 2, 3] B = a B [0] = 0a [-1] = 4 print bprint

Then modify the last element of a to 4. Have you guessed the execution result?

Yes:

[0, 2, 4]
[0, 2, 4]