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python script is not running

0 votes
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I want to run python script which generating data into json fromat, I am using crontab, but it's not executing...

my python code--

try.py --

import json
import simplejson as json
import sys

def tryJson():
 saved = sys.stdout
 correctFile = file('data.json', 'a+')
 sys.stdout = correctFile
 result = []
 i = 1
 for i in range(5):
 info = {
 'a': i+1,
 'b': i+2,
 'c': i+3,
 }
 result.append(info)

 if result:
 print json.dumps(result, indent=6)
 sys.stdout = saved
 correctFile.close()
tryJson()

now i m doing ion terminal-
avin@hp:~$ crontab -e
then type -
*/2 * * * * python /home/avin/data/try.py

and save

but it's not executing.

posted May 18, 2013 by anonymous

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1 Answer

0 votes

You may need to put an explicit path to your Python interpreter. Type:

$ which python

and put that into your crontab.

answer May 18, 2013 by anonymous
True. Somewhat more generally, jobs run under cron have a far more barren environment than most people realize. Or, looking at it a different way, most people don't even realize all the ways they depend on their environment being set up properly by the login process.

If you've set things like PYTHONPATH, you won't have them set right for cron jobs unless you explicitly reset them in your crontab.

It's often instructive to run something like "env > /tmp/xxx" under cron, and compare that to what you get when you run "env" at a command-line prompt.
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