Typo: 'mode' should be a key rather than value.

[whitish]

If you change it to key you will see significantly slower conversion. Looks like this typo comes from the original class though.

CS231/assignment2/cs231n/classifiers/cnn.py

Line 143 in 11f0521

bn_param[mode] = mode

Should be:

    bn_param['mode'] = mode