03-28-2007
Python and Crontab
Hi,
I am running a Python program using crontab as follows:
* * * * * /home/usernine/metriculate.py
But I keep getting an error: import: unable to open X server
The following is what was in my mail on execution of crontab:
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/home/usernine>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=usernine>
X-Cron-Env: <USER=usernine>
Message-Id: <20070328185601.8620D9B57C@dunlo.ancpeet.org>
Date: Wed, 28 Mar 2007 11:56:01 -0700 (PDT)
import: unable to open X server `'.
/home/usernine/metriculate.py: line 2: syntax error near unexpected token `('
/home/usernine/metriculate.py: line 2: `db1 = MySQLdb.connect(host="localhost", user="univer", passwd="loontoon", db="met")
I have no clue on what I should do about this error. An online search said that the error could be because of the DISPLAY environment and an xauth file. If that IS the problem please do tell me what I should do to solve this problem.
Thank you,
David
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LEARN ABOUT DEBIAN
set::crontab
Crontab(3pm) User Contributed Perl Documentation Crontab(3pm)
NAME
Set::Crontab - Expand crontab(5)-style integer lists
SYNOPSIS
$s = Set::Crontab->new("1-9/3,>15,>30,!23", [0..30]);
if ($s->contains(3)) { ... }
DESCRIPTION
Set::Crontab parses crontab-style lists of integers and defines some utility functions to make it easier to deal with them.
Syntax
Numbers, ranges, *, and step values all work exactly as described in crontab(5). A few extensions to the standard syntax are described
below.
< and >
<N selects the elements smaller than N from the entire range, and adds them to the set. >N does likewise for elements larger than N.
! !N excludes N from the set. It applies to the other specified range; otherwise it applies to the specified ranges (i.e. "!3" with a
range of "1-10" corresponds to "1-2,4-10", but ">3,!7" in the same range means "4-6,8-10").
Functions
new($spec, [@range])
Creates a new Set::Crontab object and returns a reference to it.
contains($num)
Returns true if $num exists in the set.
list()
Returns the expanded list corresponding to the set.
The functions described above croak if they are called with incorrect arguments.
SEE ALSO
crontab(5)
AUTHOR
Abhijit Menon-Sen <ams@toroid.org>
Copyright 2001 Abhijit Menon-Sen <ams@toroid.org>
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.10.1 2008-07-30 Crontab(3pm)