要求用户python3进行一系列输入 [英] Asking for a sequence of inputs from user python3

问题描述

我正在进行python练习，要求编写读取一系列整数输入并打印的Python程序

I am working on a python exercise asking for Write Python programs that read a sequence of integer inputs and print

The smallest and largest of the inputs.

到目前为止我的代码

def smallAndLarge():

    num1 = int(input("Enter a number: "))
    num2 = int(input("Enter a number: "))

    if num1 > num2:
        print(num1,"is the largest number, while",num2,"is the smallest number.")
    else:
        print(num2,"is the largest number, while",num1,"is the smallest number.")


smallAndLarge()

我正在使用def smallAndlarge():因为我的讲师希望我们将来在所有程序中都使用def函数.

I am using def smallAndlarge(): since my instructor wants us to use a def function for all of our programs in the future.

我的问题是我如何要求用户提供多个输入，直到他们决定不再添加任何输入.谢谢您的宝贵时间.

My question is how do I ask for multiple inputs from a user until they decided they dont want to add anymore inputs. Thanks for your time.

推荐答案

您可以在完成时让用户标记.(实时示例)

You could let the user flag when they are finished. (live example)

numbers = [];
in_num = None

while (in_num != ""):
    in_num = input("Please enter a number (leave blank to finish): ")
    try:
        numbers.append(int(in_num))
    except:
        if in_num != "":
            print(in_num + " is not a number. Try again.")

# Calculate largest and smallest here.

您可以为"stop"选择任意字符串，只要它与 in_num 的初始值不同即可.

You can choose any string you want for the "stop", as long as it's not the same as the initial value of in_num.

顺便说一句，您应该添加逻辑来处理错误的输入(即不是整数)，以避免运行时异常.

As an aside, you should add logic to handle bad input (i.e. not an integer) to avoid runtime exceptions.

在此特定示例中，您可能还想创建最小和最大变量，并在每次输入后计算它们的值.只需很小的计算就没什么关系，但是当您移至更大的项目时，您将需要牢记代码的效率.

In this specific example, you'd also probably want to create smallest and largest variables, and calculate their values after each input. Doesn't matter so much for a small calculation, but as you move to bigger projects, you'll want to keep the efficiency of the code in mind.

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