TypeError: 'NoneType' object has no attribute '__getitem__'

[mortis]

Hi there!

I'm checking out this very promising pynag-tool and it works very well with basic configuration.
However, I'm running into some trouble when trying to use it to parse the config we have at work.

I'm not really sure how to start debugging this to find out where it actually crashes, but here's what I get:


python pynag-test.py "Ping" breeze
Traceback (most recent call last):
  File "pynag-test.py", line 19, in <module>
    nc.parse()
  File "/usr/local/lib/python2.7/dist-packages/pynag/Parsers/__init__.py", line 1144, in parse
    self._load_file(cfg_file)
  File "/usr/local/lib/python2.7/dist-packages/pynag/Parsers/__init__.py", line 248, in _load_file
    current['meta']['line_end'] = line_num
TypeError: 'NoneType' object has no attribute '__getitem__'


I'm running nagios 3.4.1-2 on Ubuntu 12.10. (for testing on my desktop)

mortis

[Páll Sigurðsson]

Hi Morten,

Does nagios accept your configuration, i.e. if you run:

nagios -v /etc/nagios/nagios.cfg | grep -i error

mortis

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[Morten Bekkelund]

Hi Páll,

Yes, it does. It has warnings, but no errors.

[Páll Sigurðsson]

Can you comment out line 248 in file:

/usr/local/lib/python2.7/dist-packages/pynag/Parsers/__init__.py"

It should read something like this: 

current['meta']['line_end'] = line_num

There is some error handling code after that, so if there is a problem with the config, maybe you get a better error message now.

[Morten Bekkelund]

Hmmmm nice, that actually pointed me to an error in a file!
pynag.Parsers.ParserError: "Encountered Unexpected end of object definition in file 'someconfigfile.cfg'."

This is weird, cause nagios accepts it, but now, atleast, i know where to look!
Thanks a lot!

--

[Páll Sigurðsson]

Yup, looks like you have a "}" before a "define ... {" in that file.

Remember to browse through the examples at http://pynag.org/ to get a feeling on how to parse.

the pynag.Parsers module is very low level, and there is a more "pythonic" one out there called pynag.Model