Fix for PEP8 coding style.

Sorry for the delay in sending pull-req.

Fix for follow to [PEP8 coding style](http://legacy.python.org/dev/peps/pep-0008/).

I always check with [flake8](https://flake8.readthedocs.org/en/2.2.3/). also I was automatically format the code using the [autopep8](https://pypi.python.org/pypi/autopep8/).

If you want, you can try this tools :)

I am going to send the following request after this.

1. add Python3 support (py2.6 - py3.4)
2. prepare to upload to pypi (update version number,  setup.py, README. etc)  

thx