Def_option1

def do_calculation():
    print("Let's " + command + " some numbers: ")
    input1 = input("Number 1>")
    input2 = input("Number 2>")
    number1 = int(input1)
    number2 = int(input2)
    if command == "add":
        result = number1 + number2
    elif command == "subtract":
        result = number1 - number2
    output = str(result)
    if command == "add":
        print(input1 + " + " + input2 + " = " + output)
    elif command == "subtract":
        print(input1 + " - " + input2 + " = " + output)
finished = False
while finished == False:
    print("Hi, I am Eley, your personal bot.")
    command = input("If you want to calculate some numbers write 'add' or 'subtract': ")
    if command == "add":
        do_calculation()
    elif command == "subtract":
        do_calculation()