[Tutor] File mode tests (original) (raw)

Lloyd Kvam pythonTutor at venix.com
Fri Jul 30 03:45:18 CEST 2004

On Thu, 2004-07-29 at 20:18, Bill Campbell wrote:

I'm just getting my feet wet with python after programming primarily in perl since perl-3.something. I've read the Harms and McDonald ``The Quick Python Book'', and O'Reilly's ``Learning Python'', but haven't been able to find python equivalents to these perl tests (lots of others in os.path, but not these :-).

import os

if ( -x path ) # is is executable if os.access(path, os.X_OK): if ( -r path ) # is it readable if os.access(path, os.R_OK): if ( -w path ) # is it writeable if os.access(path, os.W_OK):

http://docs.python.org/lib/os-file-dir.html

This is the relevant piece of documentation for the os module. It is more verbose than perl since Python offers these functions through a module.

I would love to find documentation, something like ``python for the perl hacker'' that would help in the transition.

Google may be able to help with that. Otherwise browse through the Library reference:

http://docs.python.org/lib/lib.html

Bill -- INTERNET: bill at Celestial.COM Bill Campbell; Celestial Systems, Inc. UUCP: camco!bill PO Box 820; 6641 E. Mercer Way FAX: (206) 232-9186 Mercer Island, WA 98040-0820; (206) 236-1676 URL: http://www.celestial.com/ ``Mechanical Engineers build weapons. Civil Engineers build targets.''

Interesting observation.

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