cubicweb-timeseries #3849022 fix cubicweb API violation [open] is a Bytes thing.
Hence we expect that it contains a Binary object.

However for some foggy reason, .data can be magically transformed into a numpy.array, which will break generic code.

To access the numpy array, a specific accessor should be used.

This may break existing apps, hence must be done in a major release.

done in2.0.0
load left1.000
closed by<not specified>