Nothing much is known about Python's past other than he was recruited into the Serpents. He was the second most dangerous member of the Serpents and criminal in the Dragon World. If Kobra was not present he was seen leading the serpents instead. He has some type love interest for Viper but was constantly rejected.
Python only focused on the aims of the Serpents, orders set by Kobra and Viper his love interest other than that, he cares for nothing else.