functions.py

def max_num (num1,num2,num3):
    if num1 >= num2 and num1 >= num3 :
        return num1
    elif num2 >= num1 and num2 >= num3:
        return num2
    else:
        return num3


print(max_num(30,400,5))




def calculation():
    print("Let's " + command + " some numbers")

    if command == "add":
        input1 = input("Number 1 : ")
        input2 = input("Number 2 : ")
        result = int(input1) + int(input2)
        print(str(result))

    elif command == "subtract":
        input1 = input("Number 1 : ")
        input2 = input("Number 2 : ")
        result = int(input1) - int(input2)
        print(str(result))

    elif command == "total":
        result = 0
        how_many = input("how many numbers do you want to add? ")
        for loop in range(int(how_many)):
            number = input("Enter number " + str(loop) + ": ")
            result = result + int(number)
        print(str(result))

    elif command == "average":
        result = 0
        how_many = input("How many numbers do you want to enter? ")
        for loop in range(int(how_many)):
            number = input("Enter number " + str(loop) + ": ")
            result = result + int(number)
        average = int(result) / int(how_many)
        print(str(average))

loop = True
while loop == True:

    print("Hi,i'm Oracle your personal bot")
    command = input("How can i help? ")

    if command == "add" or command == "subtract" or command == "total" or command == "average":
        calculation()

    elif command == "bye" or command == "exit" or command == "stop":
        loop = False

    else:
        print("wrong entry / operator")