Unable to reproduce last notebook example

[masek014]

Problem

The last example in the example notebook is not reproducing what is shown in the repository. The labels on the dashed lines are incorrect. There is a mismatch between the lines and the label shown on the lines when specifying the lines parameter in labelLines.

Image produced when I run the example:

It appears this problem is a result of using the labels from the all_labels variable from the ax.get_legend_handles_labels() call on line 130. The for loop at line 199 in core.py assumes that all_labels and all_lines have the same ordering, which may not always be true if the lines parameter is specified.

It looks like the example notebook hasn't been updated in 3 years, so I presume some change to core.py in the meantime has resulted in this issue.

Tentative solution

I was able to fix this by ignoring the all_labels variable and reading the label directly from the line object when iterating through all_lines. This can be done by changing line 200 to the following: label = line.get_label().

However, perhaps there is a reason this is not already the default. I did not test this with every line object in matplotlib, so there could be some objects in matplotlib that do not support the get_label method.

Thanks

Despite this issue, this is a nice package.
I appreciate the work put into it, and I plan on using it :)

[cphyc]

Oh yep, that looks like a bug! I am quite oversubscribed but I'd be happy to review a pull request should you find time to fix this :)

[cphyc]

So it turns out I don't have much time to track that issue down. This is a new-contributor friendly bug, so please (anyone) feel free to fix!