Chage generation leaving behind .model.pt files

[IAlibay]

I am generate charges using espaloma via the OpenFF toolkitwrapper interface in the following manner: https://github.com/IAlibay/partial_charge_experiments/blob/main/scripts/run-espaloma.py

Calling this seems to leave behind .model.pt files which are somewhat unexplained.

Should these be present? If so is there a way to define the filename so that they can be a bit more descriptive?

[mikemhenry]

I am thinking we can either use pooch or what I had setup for espaloma