How to combine on if statment if int number equal to element in the list of int?

Let's say I want to random number, but the number cannot be i, or number that is already in the list. How can I check against my list in the if statement?

I think I'm close to the answer:

if randlink == i or (randlink == x for x in listofnumbers):
    return randNumber(i, listofnumbers)

This function returns a number that did not appear before, this is the code:

def randNumber(i, listofnumbers):
    from random import randrange
    randlink = randrange(0, size)
    if randlink == i or [randlink == x for x in listofnumbers]:
        return randNumber(i, listofnumbers)
    return randlink