pylint fix for dependencycount extension

Hi Terry,

Did not know about Travis before, thank you so much for showing me how this works. The tests that travis runs seems to be passing on my computer. Will check to see if it passes on the framework. 

Really appreciate your time!

![1](https://cloud.githubusercontent.com/assets/2679454/2786056/a15280ea-cb68-11e3-92be-297b7f0b4256.png)