IOError when file does not exist (yet)

[alfredodeza]

When editing a new file Python will raise an IOError and it will fill the Messages window with errors similar to this:

Error detected while processing function <SNR>37_ShowComplexity:
line    3:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<string>", line 163, in show_complexity
  File "<string>", line 175, in compute_scores_for
IOError: [Errno 2] No such file or directory: '/opt/devel/cms_dev/src/conf/foo.py'

Easy fix, but prefer to report it before I forget about it. I can send a pull request with a fix in the next week or so unless you beat me to it.

[garybernhardt]

I almost never write Python right now, so I'm probably not going to beat you to it, but a PR would be appreciated. :)