Python-сообщество

 while True:
        print("Options:")
        print("Enter 'add' to add two numbers")
        print("Enter 'subt' to subtract two numbers")
        print("Enter 'multi' to multiply two numbers")
        print("Enter 'divide' to divide two numbers")
        print("Enter 'percent' to find it")
        print("Enter 'sqrt' to find it")
        print("Enter 'quit' to end the program")
        user_input = input(": ")
        if user_input == "quit":
                break
        elif user_input == "add":
                try:
                        num1 = float(input("Enter a number: "))
                        num2 = float(input("Enter another number: "))
                except ValueError:
                        print("Not an integer")
                        continue
                result = str(num1 + num2)
                print("The answer is " + result)
        elif user_input == "subt":
                num1 = float(input("Enter a number: "))
                num2 = float(input("Enter another number: "))
                result = str(num1 - num2)
                print("The answer is " + result)
        elif user_input == "multi":
                num1 = float(input("Enter a number: "))
                num2 = float(input("Enter another number: "))
                result = str(num1 * num2)
                print("The answer is " + result)
        elif user_input == "divide":
                num1 = float(input("Enter a number: "))
                num2 = float(input("Enter another number: "))
                result = str(num1 / num2)
                print("The answer is " + result)
        elif user_input == "percent":
                num1 = float(input("Enter a number: "))
                percent = float(input("Enter percent: "))
                result = str(num1 / 100 * percent)
                print("The answer is " + result)
        elif user_input == "sqrt":
                num1 = float(input("Enter a number: "))
                import math
                result = str(math.sqrt(num1))
                print("The answer is " + result)
        else:
                print("Unknown input")
        

 try:
                        num1 = float(input("Enter a number: "))
                        num2 = float(input("Enter another number: "))
                except ValueError:
                        print("Not an integer")
                        continue

  
>>> def input_numbers(message, how_many):
...     out = []
...     for i in range(how_many):
...         string = input(message.format(i + 1))
...         # Здесь ты можешь проверить, что ты там навводил
...         out.append(float(string))
...     return out
... 
>>> def f():
...     # Здесь ты можешь выбрать, сколько чисел вводить и какое сообщение
...     # должно выводиться на экран
...     numbers = input_numbers('Введите число {}: ', 3)
...     return numbers
... 
>>> f()
Введите число 1: 123
Введите число 2: 4.5
Введите число 3: -6.789
[123.0, 4.5, -6.789]
>>>