Python function to request a user input while handling the input errors without having a messy code.

parseinput.py

def parseInput(message, returnType="int", callback=None):
    while True:
        res = input(message)

        if returnType == "int":
            try:
                returnVal = int(res)
            except ValueError:
                continue

            if not callback or callback(returnVal):
                return returnVal
        elif returnType == "float":
            try:
                returnVal = float(res)
            except ValueError:
                continue

            if not callback or callback(returnVal):
                return returnVal
        elif returnType == "str":
            if not callback or callback(res):
                return res