如何限制字符串中的字母数量 [英] How do I limit the amount of letters in a string

问题描述

我有一个程序，要求用户输入问题，然后程序会回答它.我想知道的是如何限制用户可以输入到变量中的字母数量.

I have a program that asks a the user to input a question, the program then answers it. What I want to know is how do I limit the amount of letters a user can input into a variable.

推荐答案

Python的 input 函数不能直接执行此操作；但是您可以截断返回的字符串，或者重复执行直到结果足够短为止.

Python's input function cannot do this directly; but you can truncate the returned string, or repeat until the result is short enough.

# method 1
answer = input("What's up, doc? ")[:10]  # no more than 10 characters

# method 2
while True:
    answer = input("What's up, doc? ")
    if len(answer) <= 10:
        break
    else:
        print("Too much info - keep it shorter!")

如果这不是您要的内容，则需要使您的问题更具体.

If that's not what you're asking, you need to make your question more specific.

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