与 IOError 相关的 Python 错误号是否稳定? [英] Are Python error numbers associated with IOError stable?

问题描述

我想移动一个文件，但如果找不到它，我应该忽略它.在所有其他情况下，应该传播异常.我有以下一段 Python 代码:

I want to move a file, but in the case it is not found I should just ignore it. In all other cases the exception should be propagated. I have the following piece of Python code:

try:
    shutil.move(old_path, new_path)
except IOError as e:
    if e.errno != 2: raise e

errno == 2 是具有没有这样的文件或目录"描述的那个.我想知道这是否跨 Python 版本和平台等稳定.

errno == 2 is the one, that has 'No such file or directory' description. I wonder if this is stable across Python versions and platforms, and etc.

推荐答案

最好使用 errno 模块而不是对值 2 进行硬编码:

It is better to use values from the errno module instead of hardcoding the value 2:

try:
    shutil.move(old_path, new_path)
except IOError as e:
    if e.errno != errno.ENOENT: raise e

这使您的代码不太可能在整数错误值发生变化时中断(尽管这种情况不太可能发生).

This makes your code less likely to break in case the integer error value changes (although that is unlikely to occur).

这篇关于与 IOError 相关的 Python 错误号是否稳定?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！