New submission from Erick Tryzelaar idade...@users.sourceforge.net:
Python version 3.0.1's io.StringIO has a bug when trying to use
universal newlines on the mac. It's fixed in 3.1a1 though. Here's the
exception:
io.StringIO('hello there\r\nlela\r\n', newline=None).readlines()
Traceback (most recent call last):
File stdin, line 1, in module
File
/opt/local/Library/Frameworks/Python.framework/Versions/3.0/lib/python3
.0/io.py, line 536, in readlines
return list(self)
File
/opt/local/Library/Frameworks/Python.framework/Versions/3.0/lib/python3
.0/io.py, line 523, in __next__
line = self.readline()
File
/opt/local/Library/Frameworks/Python.framework/Versions/3.0/lib/python3
.0/io.py, line 2110, in readline
more_line = self.read(self._CHUNK_SIZE)
File
/opt/local/Library/Frameworks/Python.framework/Versions/3.0/lib/python3
.0/io.py, line 2007, in read
res = self._decode_newlines(self._read(n), True)
File
/opt/local/Library/Frameworks/Python.framework/Versions/3.0/lib/python3
.0/io.py, line 1953, in _decode_newlines
return output
UnboundLocalError: local variable 'output' referenced before assignment
The broken code is this:
if self._readtranslate:
if crlf:
output = input.replace(\r\n, \n)
if cr:
output = input.replace(\r, \n)
else:
output = input
It appears to fix the problem if we do this:
output = input
if self._readtranslate:
if crlf:
output = output.replace(\r\n, \n)
if cr:
output = output.replace(\r, \n)
--
components: Library (Lib)
message_count: 1.0
messages: 83352
nosy: erickt
nosy_count: 1.0
severity: normal
status: open
title: io.StringIO's universal newlines support is broken in 3.0.1
type: behavior
versions: Python 3.0
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http://bugs.python.org/issue5456
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