Mstemplate

[freiburgermsu]

Hello @cshenry !

Here are edits, error corrections, and comments for MSTemplate:

1. unused imports, unused function parameters, and undefined functions are flagged
   

2. variable definitions are consolidated and default values were added to the signature to reduce redundancy
   

3. generic argument names -- e.g. o and x -- were elaborated for greater readability
   

4. a comment to remove an unused class attribute was heeded
   

5. set() operations -- e.g. .update() and .intersection() -- were leveraged for greater efficiency than loops
   

6. lambda loops were replaced with faster and more concise list comprehension
   

7. Error messages were clarified
   

Thank you so much :)
Andrew