While循环不会结束并且总是从顶部开始

Question

由于某种原因，我的

while

循环不会中断

我尝试通过使用数字来控制循环等来修改循环，但它在我当前的代码中不起作用：

escape = False #Initialize escape variable

while not escape:
    try:
        num1 = float(input("Enter the first number: "))
        oppChoice = input("Enter operation (+, -, *, /): ")
        num2 = float(input("Enter the second number: "))

        #Call the operations method with the numbers entered
        calc_instance.operations(num1, num2)

        #Using an if-elif statement to guide the print statements
        if oppChoice == "+":
            print(f"Result (Addition): {calc_instance.add}")
        elif oppChoice == "-":
            print(f"Result (Subtraction): {calc_instance.subtract}")
        elif oppChoice == "*":
            print(f"Result (Multiplication): {calc_instance.multiply}")
        elif oppChoice == "/":
            print(f"Result (Division): {calc_instance.divide}")
        else:
            print("Invalid operation choice. Please enter +, -, *, or /.")

        #Asking if the user wants to continue calculating
        end_program = input("Are you done calculating? (y/n)").lower()
        if end_program in ("y", "yes"):
            escape = True  #Set escape to True to break the loop
        elif end_program not in ("n", "no"):
            print("Please enter yes or no.")

    except ValueError:  #Handle invalid input
        print("Invalid input. Please enter valid numeric values.")

Answer 1

将escape设置为true后，再突破有没有坏处？ 只需在 escape = True 部分下输入break