Traceback (most recent call last):


 "<stdin>", line 1, in <module>
TypeError: can't change class of type '<class 'A'>'

Traceback (most recent call last):


 "scripts/extract_features.py", line 114, in <module>

main(args)


 "scripts/extract_features.py", line 108, in main

feat_dset[i0:i1] = feats
TypeError: 'NoneType' object does not support item assignment
