[Matplotlib-users] pick markers only but not the connecting line

[C M <cmp...@gm...>]

I had been using a custom function (written originally by Jae-Joon and
modified a little by me...quite a long time back now) that was working to
allow point picking of markers, but *not* the line connecting them.
However, I've now discovered with the help of this list that the function I
am using has the disadvantage that if there are more than 100 data points,
I can't get the correct index for the picked marker (turned out not to be a
mpl bug:  https://github.com/matplotlib/matplotlib/issues/3124).

So I can just use the default pick event, but then the user can pick
anywhere on the connecting line, which is meaningless in this use--so I
don't want them to be able to pick on the connecting line.

My goal is to have a custom function that will serve *both* purposes:
allow picking the markers only, not the line, of a set of data of any
length while returning the correct index of that marker/data point.  But
the code in the custom function is mostly above my head, was written for
mpl 0.99 or so, and I don't know how to modify it to get both purposes
achieved.

I attach the current sample again, with the problematic custom picker
function, "contains_points()".  Thanks for any suggestions or help.

Che