Startup.py

day = None

while (day == None): 
    try:
        day = int(input("Select day: "))
    except:
        print("Invalid input")

if (day == 0):
    #print("The total meal cost is %d dollars." % round(totalMealCost))
    print("Day %d" % day)
    import Day00
if (day == 1):
    print("Day %d" % day)
    import Day01
elif (day == 2):
    print("Day %d" % day)
    import Day02
elif (day == 3):
    print("Day %d" % day)
    import Day03
elif (day == 4):
    print("Day %d" % day)
    import Day04
elif (day == 5):
    print("Day %d" % day)
    import Day05
elif (day == 6):
    print("Day %d" % day)
    import Day06
elif (day == 7):
    print("Day %d" % day)
    import Day07
elif (day == 8):
    print("Day %d" % day)
    import Day08
elif (day == 9):
    print("Day %d" % day)
    import Day09
elif (day == 10):
    print("Day %d" % day)
    import Day10
elif (day == 11):
    print("Day %d" % day)
    import Day11
elif (day == 12):
    print("Day %d" % day)
    import Day12
elif (day == 13):
    print("Day %d" % day)
    import Day13
elif (day == 14):
    print("Day %d" % day)
    import Day14
elif (day == 15):
    pass
elif (day == 16):
    pass
elif (day == 17):
    pass
elif (day == 18):
    pass
elif (day == 19):
    pass
elif (day == 20):
    pass
elif (day == 21):
    pass
elif (day == 22):
    pass
elif (day == 23):
    pass
elif (day == 24):
    pass
elif (day == 25):
    pass
elif (day == 26):
    pass
elif (day == 27):
    pass
elif (day == 28):
    pass
elif (day == 29):
    pass
elif (day == 30):
    pass