4.10 Create a function for totals and averages

finished = False
def do_calculation():
        if command=="add" or command=="subtract":
            print("Let us " + command + " some numbers")
            input1=input("Number 1> ")
            input2=input("Number 2> ")
            number1=int(input1)
            number2=int(input2)
            if command=="add":
                result=number1+number2
                operator=" + "
            elif command=="subtract":
                result=number1-number2
                operator=" - "
            output=str(result)
            print(input1+operator+input2+" = "+output)
        else:
            print(command+" is not a valid answer. I do not know if I should add, subtract or calculate an average. Please Try again.")

def count_the_list():
    shopping=[]
    count=0
    how_many=input(users_name+", how many items do you have on your shopping list? ")
    how_many=int(how_many)
    for item_number in range(how_many):
        item=input("What is the item number "+str(item_number)+" ? ")
        shopping.append(item)
    for item in shopping:
        print(item)
        count=count+1
    print(count)
    print (len(shopping))
    strcount=str(count)
    print (users_name+", you have "+strcount+" items in your shopping list.")

def avg_numbers():
    how_many=input("How Many Numbers Do You Want to Average?>")
    how_many=int(how_many)
    total=0
    for number_count in range(how_many):
        number=input("Enter number "+str(number_count)+"> ")
        total = total + int(number)
    result=total/how_many
    print("The average = "+str(result))

while finished == False:
    print("Hi, I am the bot that Sue created.")
    print("Let's get started.")
    users_name=input("What is your name? ")
    print("Welcome "+users_name)
    command=input("Please type add, subtract, or mean to calculate the average. Type bye if you would like to leave the program.>")
    if command=="bye":
        finished=True
    elif command=="mean":
        avg_numbers()
    else:
        do_calculation()
    if finished==False:
        count_the_list()