Good way of checking variable and using an if statement (Python 3.x)

My code looks like this:

while variable > 20 or variable < 1 or variable etc etc:
    variable = input()
    if variable > 20 or variable < 1 or variable etc etc:
        print("The variable should be between 1 and 20.")

The thing is, I don't want to have to repeat myself in the if statement when I'm checking for the variable to fit a lot of criteria. Is there a shorter/more elegant way or checking the variable with the same criteria at both points?