如何确保文件存在或可以创建之前写入到Python？ [英] How to make sure a file exists or can be created before writing to it in Python?

问题描述

我正在写一个函数，我希望它能 touch 一个文件，以便我可以写入该文件。如果该文件不存在，我会得到一个错误。我怎么能这样说？

I'm writing a function and I want it to touch a file so that I can write to that file. If the file doesn't exist, I will get an error. How can I say that?

推荐答案

只要打开文件进行写入，如果不存在

Just open the file for writing and it will be created if it doesn't exist (assuming you have proper permission to write to that location).

f = open('some_file_that_might_not_exist.txt', 'w')
f.write(data)

您将得到 IOError 如果您无法打开文件进行写入。

You will get an IOError if you can't open the file for writing.

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