Commenting arg/restype for debugging function.

Is it not needed to run ObsPy and only useful for debugging.
fix a doctest
Py3k: realtime `futurize -0 -w .`
Py3k: passing all realtime tests on 27 and 33
Py3k: passing all db tests on 27 and 33
Py3k: passing all db tests on 27 and 33
Merge branch 'master' into py3k_futurize