Added docstrings to JAT.py

[taylorziegler]

Added docstrings to JAT.py.

[alexandermichels]

These look good, but I have one note: you are using "yeilds" for stuff that is returning. They are slightly different. Specifically yield returns a sequence of values in an iterator (think a list). This article discusses it: https://www.geeksforgeeks.org/use-yield-keyword-instead-return-keyword-python/

So just use returns instead of yields. Thanks!

[taylorziegler]

I changed all of the "yields" to returns", is it okay now?

[alexandermichels]

Yup, looks good!