python-专门处理文件存在异常 [英] python - specifically handle file exists exception
问题描述
我在这个论坛上遇到过一些示例,其中通过测试 OSError $中的
errno
值来处理围绕文件和目录的特定错误。 c $ c>(或这些天 IOError
吗?)。例如,此处的一些讨论- Python的 open()对找不到文件抛出不同的错误。 -如何处理这两种异常?。但是,我认为这不是正确的方法。毕竟,存在 FileExistsError
专门用于避免担心 errno
。
I have come across examples in this forum where a specific error around files and directories is handled by testing the errno
value in OSError
(or IOError
these days ?). For example, some discussion here - Python's "open()" throws different errors for "file not found" - how to handle both exceptions?. But, I think, that is not the right way. After all, a FileExistsError
exists specifically to avoid having to worry about errno
.
以下尝试没有成功,因为令牌 FileExistsError
出现错误。
The following attempt didn't work as I get an error for the token FileExistsError
.
try:
os.mkdir(folderPath)
except FileExistsError:
print 'Directory not created.'
如何检查此错误以及其他类似的错误?
How do you check for this and similar other errors specifically ?
推荐答案
根据代码 print ...
,看来您正在使用Python2.x。 FileExistsError
是在Python 3.3中添加;您不能使用 FileExistsError
。
According to the code print ...
, it seems like you're using Python 2.x. FileExistsError
was added in Python 3.3; You can't use FileExistsError
.
使用 errno.EEXIST
:
import os
import errno
try:
os.mkdir(folderPath)
except OSError as e:
if e.errno == errno.EEXIST:
print('Directory not created.')
else:
raise
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