There are many places where we could make use of Pathlib.

Look for any places that uses with open(...) and ask yourself:

• is the argument a string ?
• would it make sens to make it a Path(),
• how far upstream in the code can I make it a Path.

Don't try to bite more than you can chew (or more than I can review), try to fix 1 place at a time.

could you add one of the spellchecker plugins?

Use case

Polyaxon tracking can be used to automatically log all information generated by Ludwig.

We should probably think about adding support for Polyaxon's tracking module in Ludwig contrib.

We need to change the setup.py to indicate the library is python 3.5+ only, and do a pass for any bytes/str checks in the code that should be simplified to the python 3 variant only.

We'll probably pin this to 0.4 release rather than doing a major release since this project is still a beta project without a 1.0 release yet.