import python from https://github.com/poise/python/tree/dd651062c538b3fd98d8b6bca12b97a0fdd5d5e8
Merge pull request #143 from phunehehe/python

import python from https://github.com/poise/python/tree/dd651062c538b3fd98d8b6bca12b97a0fdd5d5e8
sync password and connection limit for pgsql
tweaks according to foodcritic
Merge pull request #144 from phunehehe/pgsql

Pgsql