def total average

def do_calculation():

    R1 = input ( "How many numbers?> ")
    numbers = []
    total = 0

    for item_number in range(int(R1)):
        item = input("Enter number >")
        numbers.append(item)
        total = total + int(item)
    if command == "total":

        result = total

    elif command == "average":
        result = total / int(R1)
    print(command + "=" + str(result) )
finished = False
while finished == False :
    print("Hi, I am Marvin, your personal bot.")
    command = input("How can I help? ")
    if command == "total":
        do_calculation()
    elif command == "average":
        do_calculation()
    elif command == "bye" :
        finished = True
    else :
        print ("Sorry I do not understand this " )