PEP8 Formatting

[PabloLec]

I just made a test, to see what auto formatting tool could best fit the project.
So, in order to keep docstrings intact we cannot use black. That leaves us with autopep8 and yapf, I guess autopep8 could do the job.

I tested it on __init__.py as a demo because it's a pretty big piece.
Configuration is vanilla except for max line length, I set it to 88 as black does, we could set another value.

Tell me if the file looks good to you @jwlodek, or if something seems odd.

In my opinion the code already looks nicer, more consistent.

[jwlodek]

This looks good, maybe only suggestion would be bump the line length a bit? Maybe to ~95? I have a preference for longer lines where possible. If you could adjust for that and fix the newly found conflicts I'll approve and merge.

[PabloLec]

So I tried to increase the line length with autopep8 but it broke some parts, like function parameters were left untouched, even if formatting wasn't right, if line length was <95.
Then I tried to switch to yapf, again some strange behavior like:

def some_func():
    pass

became:

def some_func(
):
    pass

Which is just useless and ugly.

So I came back to black with a line length of 95. black just works without any tweak and conf needed which is great. I can't remember what we said about docstrings but they look unchanged so I guess the powerful and simple black will do the job.
Also, not sure about the current conflict, is it a bug ?

[jwlodek]

I believe the current conflict is caused by some changes I've made on the branch since this PR was opened, may want to pull those changes and try re-running the formatting?

[PabloLec]

I copy/pasted the current __init__.py from v0.1.5-develop and reran formatting so it must be the same. I'm not too familiar with conflicts though but take a look at GitHub conflicts summary, it looks like an empty line.

[PabloLec]

Ok, I just deleted that empty line from GitHub it must be good for merge.
So we can either merge it right now or reformat everything prior.
I think it might be a good idea for me to reformat everything right now, have a good clean codebase and make sure to run black at least before a dev branch is merged into master.

[jwlodek]

Ok, I think it looks fine to me, maybe would want to replace the default " characters with just ', but that's not a big deal, merged. Could you run the formatting on the other files in the project when you have a chance? Also, will need to make some CI jobs that check if formatting matches our requirements, but that can be tracked as a different issue.