是否有跨平台的方式从Python的OSError获取信息? [英] Is there a cross-platform way of getting information from Python's OSError?
问题描述
在简单的目录创建操作中,我可以像这样做一个OSError:
On a simple directory creation operation for example, I can make an OSError like this:
(Ubuntu Linux)
(Ubuntu Linux)
>>> import os
>>> os.mkdir('foo')
>>> os.mkdir('foo')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OSError: [Errno 17] File exists: 'foo'
现在我可以抓住这样的错误:
Now I can catch that error like this:
>>> import os
>>> os.mkdir('foo')
>>> try:
... os.mkdir('foo')
... except OSError, e:
... print e.args
...
(17, 'File exists')
有一种跨平台的方式,我可以知道17或档案存在者总是意味着相同的事情,以便我可以根据情况采取不同的行动。
Is there a cross-platform way that I can know that that the 17 or the 'File Exists' will always mean the same thing so that I can act differently depending on the situation?
(这是一个另一个问题) p>
(This came up during another question.)
推荐答案
错误中的 errno
属性在所有平台上都应该相同。您将在Windows上获得 WindowsError
异常,但由于这是OSError的子类,所以除了OSError:
块会抓住它Windows有自己的错误代码,这些代码可以 .winerror
访问,但$ code> .errno 属性应该仍然是
The errno
attribute on the error should be the same on all platforms. You will get WindowsError
exceptions on Windows, but since this is a subclass of OSError the same "except OSError:
" block will catch it. Windows does have its own error codes, and these are accessible as .winerror
, but the .errno
attribute should still be present, and usable in a cross-platform way.
各种错误代码的符号名称可以在 errno $ c $中找到c>模块。
例如,
Symbolic names for the various error codes can be found in the errno
module.
For example,
import os, errno
try:
os.mkdir('test')
except OSError, e:
if e.errno == errno.EEXIST:
# Do something
您还可以使用 errno.errorcode
执行反向查找(以查找应该使用的代码)。那就是:
You can also perform the reverse lookup (to find out what code you should be using) with errno.errorcode
. That is:
>>> errno.errorcode[17]
'EEXIST'
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