David Pursehouse 686bfea7b3 Fix minor python code style issues
Fix some minor issues that were reported by pyflakes and pylint.

- Rename arguments to prevent redefinition of built-in 'dir'
- Rename method call to prevent redefinition of built-in 'help'
- Remove unused imports
- Prefix unused variable with underscore to prevent warning

Change-Id: Ia9e21c0f1a69af43f6e4566be46c31bdda540d2f
2014-12-18 02:51:06 +00:00
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