When to put parentheses in if statement and when not?

Question

For example we write if(1==1)
but we can also write if 'hello' in list:?
Please anyone who can give the best explanation to this?

Answer 1

In Python, you do not need parentheses in conditionals, though most programming languages do.

Answer 2

You described two different languages. In python, you don't need parentheses (same as brackets), but in most languages you do

Answer 3

Sorry I mean 'parentheses' in Python specially in conditionals