[Tutor] Re: IOError exception handling

[Derrick 'dman' Hudson]

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On Sun, Jul 28, 2002 at 04:33:22PM -0700, Allyn Weaks wrote:
| Python 2.1 until I can get 2.2.1 installed properly (linux 7.1), but

Linux is only at version 2.5.<something> if you follow Linus'
development work.

| Can one get a more detailed error back than IOError?  I'm counting
| lines in files that may or may not exist, and if one doesn't exist, I
| can set the number of lines to zero and continue with the rest.  But,
| if the file can't be opened because of any other problem, such as a
| permission error, I want it to bail with whatever error message is
| appropriate (preferably without handling each and every case.)

Use os.path.exists() to first query the existance of a file.  Then
only attempt to open it if it exists.

HTH,
-D

--=20
The crucible for silver and the furnace for gold,
but the Lord tests the heart.
        Proverbs 17:3
=20
http://dman.ddts.net/~dman/

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