Performance

Question

I want to figure out what's the good practices when coding python, like at the example of the exercise, we have different ways to make the same process.
Example 1:
x=7
x+=2

Example 2:
X=7
X = x +2

Processing speaking does it have any differences at these two examples, if so how can I know when use one or other.

Answer 1

That's just sintatic sugar so there's no performance difference between those two instructions