[Python-Dev] Raising OSError concrete classes from errno code

[Serhiy Storchaka]

On 25.12.12 23:55, Andrew Svetlov wrote:
> Currently we have exception tree of classes inherited from OSError
> When we use C API we can call PyErr_SetFromErrno and
> PyErr_SetFromErrnoWithFilename[Object] functions.
> This ones raise concrete exception class (FileNotFoundError for
> example) looking on implicit errno value.
> I cannot see the way to do it from python.

 >>> raise OSError(errno.ENOENT, 'No such file or directory', 'qwerty')
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
FileNotFoundError: [Errno 2] No such file or directory: 'qwerty'