آلة حاسبة بسيطة في Python مع معالجة القسمة على صفر

from math import isfinite

def calculate(first, second, operator):
    if not isfinite(first) or not isfinite(second):
        raise ValueError("Use finite numbers.")
    if operator == "+":
        result = first + second
    elif operator == "-":
        result = first - second
    elif operator == "*":
        result = first * second
    elif operator == "/":
        if second == 0:
            raise ValueError("Cannot divide by zero.")
        result = first / second
    else:
        raise ValueError("Unknown operator.")
    if not isfinite(result):
        raise ValueError("Result is outside the supported range.")
    return result

if __name__ == "__main__":
    try:
        first = float(input("First number: "))
        operator = input("Operator (+ - * /): ").strip()
        second = float(input("Second number: "))
        print("Result:", calculate(first, second, operator))
    except (ValueError, OverflowError) as error:
        print("Invalid input:", error)