
There is no need to support Python 2.7 anymore, Python 3.3+ has `subprocess.DEVNULL`. This is good practice and also prevents file handles from staying open unnecessarily. Also remove a couple unused or unneeded `__future__` imports.
There is no need to support Python 2.7 anymore, Python 3.3+ has `subprocess.DEVNULL`. This is good practice and also prevents file handles from staying open unnecessarily. Also remove a couple unused or unneeded `__future__` imports.