创建文件循环 [英] Creating file loop

问题描述

如何向用户询问文件名以及该文件名是否已存在，请询问用户是否要覆盖它，并听从他们的请求.如果该文件不存在，则应创建一个新文件(具有所选名称).通过对Python网站和Stack Overflow的一些研究，我得出了这段代码

How can I ask the user for a file name and if it already exists, ask the user if they want to overwrite it or not, and obey their request. If the file does not exist, a new file (with the selected name) should be created. From some research on both the Python website and Stack Overflow, I've come up with this code

try:
    with open(input("Please enter a suitable file name")) as file:
        print("This filename already exists")

except IOError:
    my_file = open("output.txt", "r+")

但这将无法在Python中运行，并且无法完成我希望它执行的所有操作.

But this will not run in Python, and doesn't do everything I want it to do.

推荐答案

替代解决方案是(但是用户需要提供完整路径):

Alternative soltution would be (however the user would need to provide a full path):

import os

def func():
    if os.path.exists(input("Enter name: ")):
        if input("File already exists. Overwrite it? (y/n) ")[0] == 'y':
            my_file = open("filename.txt", 'w+')
        else:
            func()

    else:
    my_file = open("filename.txt", 'w+')

别忘了当不再需要使用 my_file.close()关闭文件对象时.

Don't forget to close the file object when it's not needed anymore with my_file.close().

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