def do_calculation():
    # Calculation_code
    print("Lets " + command + " some numbers. ")
    input1 = input("Length >1 ")
    input2 = input("Length >2 ")
    Length1 = int(input1)
    Length2 = int(input2)

    # Addition
    if command == "add" or command == "Add" or command == "Plus" or command == "plus":
        result = Length1 + Length2
        operator = " + "

    # Substaraction
    elif command == "Subtract" or command == "subtract" or command == "Minus" or command == "minus":
        result = Length1 - Length2
        operator = " - "

    # Multiplication
    elif command == "Multiply" or command == "multiply" or command == "Times" or command == "times":
        result = Length1 * Length2
        operator = " * "

    # Division
    elif command == "Divide" or command == "divide":
        result = Length1 / Length2
        operator = " / "
    output = str(result)
    print(input1 + operator + input2 + " = " + output)

    ##############################################################
def Average():
    how_many = input("How many numbers would you like 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 is = " + str(result))

    #####################################################################
def total():
    how_many = input("How many shopping items do you have? ")
    how_many = int(how_many)
    shopping = []
    count = 0
    for item_number in range(how_many):
        item = input("what is item number " + str(item_number) + "? ")
        shopping.append(item)
        count = count + 1
        output = str(count)
    print("You have " + output + " items in your shopping list")
    print(shopping)
def drink():
    how_many = input("How many drinks have you had? ")
    how_many = int(how_many)
    shopping = []
    count = 0
    for item_number in range(how_many):
        item = input("what was drink number " + str(item_number) + "? ")
        shopping.append(item)
        count = count + 1
        output = str(count)
    print("You've had " + output + " drinks, and they are ")
    print(shopping)
    print("** Hic**")


finished = False
while finished == False:

    print("Hi, I'm Tricky, your personal bot")
    print("OK , so lets get started!")

    # Ask the user to enter their name
    users_name = input("What is your name? ")
    print("Hi " + users_name + ", hope your having a great day!")

    # Ask the user to enter a choice to proceed
    command = input("I can help you with some shopping by creating a shopping list, or, would you like to do a spot of maths? I can Add, Subtract, Multiply, Divide or Average , or would you like a drink?. What would you like to do? ")

    # Add
    if command == "add" or command == "Add" or command == "Plus" or command == "plus":
        do_calculation()

    # Subtract
    elif command == "Subtract" or command == "subtract" or command == "Minus" or command == "minus":
        do_calculation()

    # Multiply
    elif command == "Multiply" or command == "multiply" or command == "Times" or command == "times":
        do_calculation()

    #Divide
    elif command == "Divide" or command == "divide":
        do_calculation()

    # Average
    elif command == "Average" or command == "average" or command == "Ave" or command == "ave":
        Average()

    # Shopping
    elif command == "Shopping" or command == "shopping" or command == "Shop" or command == "shop":
        total()

    # Drinking
    elif command == "gimme a drink" or command == "Drink" or command == "booze me up" or command == "I'd like a coldie":
        drink()

    # Goodbye
    elif command == "Cya" or command == "Bye" or command == "cya" or command == "bye":

        finished = True
    # Correct choice not made
    else:
        print("Thanks for playing with me!")
    print("cya")

Hi, I'm Tricky, your personal bot
OK , so lets get started!
What is your name? Gary
Hi Gary, hope your having a great day!
I can help you with some shopping by creating a shopping list, or, would you like to do a spot of maths? I can Add, Subtract, Multiply, Divide or Average , or would you like a drink?. What would you like to do? average
How many numbers would you like to average? 3
Enter number0> 3
Enter number1> 4
Enter number2> 5
The average is = 4.0
cya
Hi, I'm Tricky, your personal bot
OK , so lets get started!
What is your name? Gary
Hi Gary, hope your having a great day!
I can help you with some shopping by creating a shopping list, or, would you like to do a spot of maths? I can Add, Subtract, Multiply, Divide or Average , or would you like a drink?. What would you like to do? shop
How many shopping items do you have? 5
what is item number 0? bread
what is item number 1? Milk
what is item number 2? butter
what is item number 3? Soap
what is item number 4? Paper
You have 5 items in your shopping list
['bread', 'Milk', 'butter', 'Soap', 'Paper']
cya
Hi, I'm Tricky, your personal bot
OK , so lets get started!
What is your name? cya
Hi cya, hope your having a great day!
I can help you with some shopping by creating a shopping list, or, would you like to do a spot of maths? I can Add, Subtract, Multiply, Divide or Average , or would you like a drink?. What would you like to do? cya
cya