A sample answer to lab question

Python Age Exercise Answer

import os
import datetime
import sys

NOW = datetime.datetime.now()
NOW_YEAR = NOW.year

def is_valid_age(age):
    return age > 0 and age < 100

def ask_age():
    age_question = "How Old Are You? "
    return input(age_question)

def check_age():
    age = 0
    while not is_valid_age(age):
        try:
            age = int(ask_age())
        except ValueError as e:
            print("Invalid Age")
            age = 0
    return age

def ask_future():
    future_question = "In what future year would you like me to tell you your age? "
    return input(future_question)

def is_valid_future(future):
    return isinstance(future, int) and future > NOW_YEAR

def calculate_future(age, future):
    return (future - NOW_YEAR) + age

def check_future(age):
    future = 0
    while not is_valid_future(future):
        future = int(ask_future())
    future_age = calculate_future(age, future)
    return future_age, future

def run():
    age = check_age()
    future_age, future = check_future(age)
    msg = "You will be {future_age} in {future}".format(future_age=future_age, future=future)
    print(msg)

if __name__ == '__main__':
    sys.exit(run())