Add warnings to users when identifier is fuzzy matched

[Casper-Guo]

I think we should issue a warning to users when they provide an invalid input that is fuzzy corrected, just for awareness.

[theOehrly]

That's a good idea, actually.

[theOehrly]

Events.get_event_by_name might benefit from a similar warning in the else where fuzzy matching is done. Or did you have a reason for specifically only adding this to the plotting functions?

[Casper-Guo]

I don't know the appropriate condition for emitting a warning in Events.get_event_by_name.

For example, supplying "Italian" to that function will return the Italian Grand Prix correctly. Based on my reading of the implementation, the EventName entry is modified to Italian . Since fuzz.ratio is sensitive to whitespace, this is not a 100% match. A warning here would just be confusing.

We can maybe use fuzz.partial_ratio instead and emit a warning when there's no 100% match, although I think that might not be bulletproof either.

Or we can get rid of all whitespaces in the strings first before comparing them.

[theOehrly]

Are you interested in figuring that out and changing the fuzzy matching code there to make it work?
Else I'll merge this as it is.

[Casper-Guo]

I'm pretty busy the next few days so a thorough investigation with a test suite will have to wait until next weekend at least. I suppose this is not urgent tho and I am happy to take a look at it.

[theOehrly]

Actually, with me working on the complete overhaul of the plotting code (to be done soon, hopefully), I'd be happy if I could rebase onto the master with these changes applied.

So if you are happy with that, I'd prefer to merge these changes. And then you could make a separate PR for the other changes without any time pressure.

[Casper-Guo]

Sounds good to me