CLI command count-frames does not print anything

[quantumdot]

Running the CLI command moseq2-model count-frames pca_scores.h5 produces no useful output. Here is what my output looks like with current versions of this package:

$ moseq2-model count-frames _pca/pca_scores.h5
Found pcs in scores
/home/user/environments/.miniconda3/envs/moseq2-app/lib/python3.7/site-packages/moseq2_model/util.py:88: UserWarning: groups key not found in h5 file, assigning each session to unique group if no moseq2-index.yaml
  warnings.warn('groups key not found in h5 file, assigning each session to unique group if no moseq2-index.yaml')

Older versions of this package would print the number of frames to stdout. Here is the output from an older version:

$ moseq2-model count-frames _pca/pca_scores.h5
Found pcs in scores
Total frames: 33981746

Looks like this function was refactored in commit b48af33 in order to put the logic behind a wrapper function which just returns the number of frames, but now the command function itself makes no effort to print the returned frame count.