New submission from Dave Malcolm <[email protected]>:
Currently sys.std[in|out|err] are set to the locale encoding but only if they
are directly connected to a tty (and PYTHONIOENCODING is not set in the
environment to override things).
The conditionality on "isatty" leads to lots of unexpected changes when scripts
are added to shell pipelines, or run from cronjobs.
For example:
[da...@brick ~]$ python -c 'print u"\u03b1\u03b2\u03b3"'
αβγ
[da...@brick ~]$ python -c 'print u"\u03b1\u03b2\u03b3"' | less
Traceback (most recent call last):
File "<string>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-2:
ordinal not in range(128)
("less" will respect the locale encoding).
The attached patch removes the check to see if these streams are connected to a
tty, so that the encoding is always set (either to the locale value, or to the
"override" value from PYTHONIOENCODING)
With this patch:
$ ./python -c 'print u"\u03b1\u03b2\u03b3"'| less
has output:
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[17298 refs]
----------
components: Unicode
files: remove-isatty-check-from-sys-stream-encodings.patch
keywords: patch
messages: 98086
nosy: dmalcolm
severity: normal
status: open
title: Remove "isatty" check when setting sys.std[in|out|err] encoding to that
of locale
versions: Python 2.7
Added file:
http://bugs.python.org/file15957/remove-isatty-check-from-sys-stream-encodings.patch
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<http://bugs.python.org/issue7745>
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