Issue 1433667: os.path.expandvars sometimes doesn't expand $HOSTNAME (original) (raw)

Issue1433667

Created on 2006-02-17 16:03 by dougfort, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Messages (5)
msg27546 - (view)	Author: Doug Fort (dougfort)	Date: 2006-02-17 16:03
$ echo "$HOSTNAME" c0a80165.tipt.aol.com $ /usr/local/bin/python Python 2.4.2 (#1, Dec 30 2005, 11:14:42) [GCC 4.0.1 (Apple Computer, Inc. build 5247)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import os.path >>> os.path.expandvars("$HOME") '/Users/dougfort' >>> os.path.expandvars("$HOSTNAME") '$HOSTNAME' >>> arthurformat-d09:arthur$ echo HOSTNAMEarthurformat−d09.ats.aol.comarthurformat−d09:arthurHOSTNAME arthurformat-d09.ats.aol.com arthurformat-d09:arthurHOSTNAMEarthurformat−d09.ats.aol.comarthurformat−d09:arthur /cm/tools/bin/python Python 2.3.4 (#1, Jul 28 2004, 14:55:53) [GCC 3.3.1] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import os.path >>> os.path.expandvars("$HOME") '/opt/aol/production/arthur' >>> os.path.expandvars("$HOSTNAME") 'arthurformat-d09.ats.aol.com'
msg27547 - (view)	Author: Georg Brandl (georg.brandl) *	Date: 2006-02-17 18:13
Logged In: YES user_id=1188172 It might be good if you explain what the differences between the two snippets are, environment-wise. The first question that comes to mind is: is $HOSTNAME exported in the first shell?
msg27548 - (view)	Author: neurogeek (neurogeek)	Date: 2006-02-17 19:20
Logged In: YES user_id=1394223 No problem for me in a Gentoo box in python 2.3.4 nor python 2.4.2 Is the problem persistent? could you give some meore info on this?
msg27549 - (view)	Author: Doug Fort (dougfort)	Date: 2006-02-17 20:11
Logged In: YES user_id=6399 It looks like posixpath.py uses os.environ to resolve environment variables. That makes sense. On my OS X 10.4 Python 2.4.2, HOSTNAME does not appear in os.environ. There must be some shell gimmick to resolve it from the command line. I originally experienced this error on RedHat Enterprise Linux. I'm unable to reproduce it in the interpreteer. The process experiencing the error is launched from our client's version of init. I suspect it just isn't getting the HOSTNAME environment variable passed to it. So in short, os.expandvars works as designed. I apologize for submitting the bug without checking more throughly.
msg27550 - (view)	Author: Georg Brandl (georg.brandl) *	Date: 2006-02-17 20:50
Logged In: YES user_id=1188172 Closing as requested.