Message 151933 - Python tracker

➜

This issue tracker has been migrated to GitHub , and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

In-reply-to
Author	anacrolix
Recipients	anacrolix
Date	2012年01月25日.05:13:46
SpamBayes Score	3.1318115e-11
Marked as misclassified	No
Message-id	<1327468428.38.0.416513768906.issue13858@psf.upfronthosting.co.za>

Content
_io._IOBase.readline doesn't seem to like _io.FileIO.read returning None, which occurs when it's unbuffered and nonblocking. (Modules/_io/fileio.c:745 in trunk). Can this be handled some other way? $ python3.3 Python 3.3.0a0 (default:fb0f4fe8123e+, Jan 24 2012, 11:21:36) [GCC 4.6.2] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import os, io >>> r, w = os.pipe2(os.O_NONBLOCK) >>> f = io.open(r, 'rb', 0) >>> f.readline() Traceback (most recent call last): File "<stdin>", line 1, in <module> OSError: read() should have returned a bytes object, not 'NoneType'

Content

_io._IOBase.readline doesn't seem to like _io.FileIO.read returning None, which occurs when it's unbuffered and nonblocking. (Modules/_io/fileio.c:745 in trunk). Can this be handled some other way?
$ python3.3
Python 3.3.0a0 (default:fb0f4fe8123e+, Jan 24 2012, 11:21:36) 
[GCC 4.6.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import os, io
>>> r, w = os.pipe2(os.O_NONBLOCK)
>>> f = io.open(r, 'rb', 0)
>>> f.readline()
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
OSError: read() should have returned a bytes object, not 'NoneType'

History
Date	User	Action	Args
2012年01月25日 05:13:48	anacrolix	set	recipients: + anacrolix
2012年01月25日 05:13:48	anacrolix	set	messageid: <1327468428.38.0.416513768906.issue13858@psf.upfronthosting.co.za>
2012年01月25日 05:13:47	anacrolix	link	issue13858 messages
2012年01月25日 05:13:46	anacrolix	create

homepage