How to return nothing in Python?

To literally return 'nothing' use pass, which basically returns the value None if put in a function(Functions must return a value, so why not 'nothing'). You can do this explicitly and return None yourself though.

So either:

if x>1:
    return(x)
else:
    pass

or

if x>1:
    return(x)
else:
    return None

…