Issue 1098990: codec readline() splits lines apart (original) (raw)

Issue1098990

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classification

Title:	codec readline() splits lines apart
Type:	Stage:
Components:	Library (Lib)	Versions:	Python 2.5

process

Status:	closed	Resolution:	fixed
Dependencies:		Superseder:
Assigned To:		Nosy List:	doerwalter, irmen
Priority:	normal	Keywords:

Created on 2005-01-09 16:45 by irmen, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Files
File name	Uploaded	Description	Edit
example.txt	irmen,2005-01-09 16:45	example shell session that shows the problem

Messages (3)
msg23904 - (view)	Author: Irmen de Jong (irmen)	Date: 2005-01-09 16:45
It seems that the fix for bug 1076985 (Incorrect behaviour of StreamReader.readline leads to crash) has introduced a new bug. using current cvs Python on Linux, I observe faulty behavior of the readline() method on file-like objects returned from the codecs module. See the attached example.txt. The readline() breaks certain lines in half. It only happens when a certain encoding is used, so regular file objects behave as expected. Also, readlines() works fine.
msg23905 - (view)	Author: Walter Dörwald (doerwalter) *	Date: 2005-01-10 11:15
Logged In: YES user_id=89016 The problem is that the first readline() reads more than the first line, returns the first line and puts back the rest for the next read. The next call to readline() discovers that there is already data there and doesn't call read() again. I'm working on a patch.
msg23906 - (view)	Author: Walter Dörwald (doerwalter) *	Date: 2005-01-10 12:26
Logged In: YES user_id=89016 Checked in as: Lib/codecs.py 1.37 Lib/test/test_codecs.py 1.18 Lib/codecs.py 1.35.2.2 Lib/test/test_codecs.py 1.15.2.2 Thanks for the report!