.get_key() can return a padded string for the ID
.get_key() can return a padded string for the ID

TODO only looks for a 'pad_0_left' keyword, it should be passed how many
characters to padd with, but for now just looks to see if key exists.
I currently set it equal to `True` in the code

this needs a unit test

chendaniely/multi-agent-neural-network,chendaniely/multi-agent-neural-network