contructing an if statement with an or in python [duplicate]

This question already has an answer here:

• Why does `a == b or c or d` always evaluate to True? [duplicate] 1 answer
• How do I test multiple variables against a value? 14 answers

This questions may have been asked before, I've looked and could not find what I needed.

I'm looking to do something rather simple: make an if statement that has multiple options:

if a == 1 or 2:
    do something
else:
    do something else

My formatting on the 'a == 1 or 2' is not correct. I've tried using:

if a == [1 or 2]
if a == np.logical_or(1, 2)

And neither of those work. I'm sure there's a way to do it, I'm having difficulty figuring out how. What would you suggest?