An AssertionError in data_loader.py

[SK-HC]

Dear Author,

Thank you for sharing code

When I run data_loader.py, I encounter these errors，as shown Fig 1. My MNE version is 0.18.0, and when the MNE version is greater than 0.19, a KeyError: 'classlabel' occurs, as mentioned by others in the Issues section, as shown Fig 2. When the MNE version is lower than 0.17, an error appears: module 'mne.io' has no attribute 'read_raw_gdf', , as shown Fig 3. Therefore, I believe the MNE version I am using is correct. The BCICIV_2a_gdf data from original "https://bbci.de/competition/iv/download/".Especially, "Data sets 2a: [ GDF files zipped (420 MB) ]"

Do you know what might be causing this issue?

[CBBtv]

I also have the same question as fig 2, ask for an answer.