how to use Postmark email API in python

hi ranvhers,

i have this assignment in which i have been asked to use Poastmark email API in python.
i have got the python library from https://github.com/themartorana/python-postmark/ posted on Postmark.

i have installed the setup.py file. and checked the installation using import postmark. its working fine.But when i issue import postmark.PMMail it shows error like module not found.

what could be the problem here ?

need some reference\code to get started.