No need to pass in the object explicitly, etc.
Doesn't have the greatest documentation, but has a full test suite (e.g., [1][2]).
[0] https://github.com/peterpaul/co2
[1] https://github.com/peterpaul/co2/blob/master/carbon/test/pas...
[2] https://github.com/peterpaul/co2/blob/master/carbon/test/pas...
0. https://github.com/peterpaul/co2/tree/master/examples/my-obj...
0. https://github.com/peterpaul/co2/tree/master/examples/my-obj...