Check if an input is a valid roman numeral

Question

I got a program that converts Roman numerals to integers and vice versa. My problem is that I don´t really know how to create a function that checks if the user input is a v

Answer 1

Call romantoint after the for loop

 def checkIfRomanNumeral(numeral):
     """Controls that the userinput only contains valid roman numerals"""
     numeral = numeral.upper()
     validRomanNumerals = ["M", "D", "C", "L", "X", "V", "I"]
     for letters in numeral:
        if letters not in validRomanNumerals:
            print("Sorry that is not a valid roman numeral")
            return False
     romanToInt(numeral)