Remove unused imports. Fix F401 flake8 warnings.

[parthea]

Fixed all flake8 warnings with code F401 (module imported but unused) that appear with the following command:

flake8 --select=F401

• Remove unused imports
• In __init__.py, add list of module names that should be imported when from package import * is encountered ( From https://docs.python.org/2/tutorial/modules.html#importing-from-a-package ) . There is additional discussion about this approach here: https://bugs.launchpad.net/pyflakes/+bug/1178905

[yelsayd]

This is great. Cleanup is always much appreciated.

While at it, can we also add the flake command to the travis file so we don't have to batch cleanup again?

[parthea]

While at it, can we also add the flake command to the travis file so we don't have to batch cleanup again?

Done for code F401 (unused imports) . I'll work on cleaning up the other flake8 codes so we can just run flake8 . without any filters.

[yelsayd]

Awesome! Let me know if you want this PR merged now or if you'll keep working on it to remove the filter.

[parthea]

Thanks @yebrahim ! Yes, please merge it. I'll tackle the other codes tomorrow. Hopefully we can remove the filter next week.