hello, when I run your code "scvae train 10x-PBMC-PP --split-data-set -m GMVAE -r negative_binomial -l 100 -H 100 100 -w 200 -e 500", the error occurs like below:
Traceback (most recent call last):
File "/data/chenliang/anaconda3/envs/tensorflow/bin/scvae", line 10, in
sys.exit(main())
File "/data/chenliang/anaconda3/envs/tensorflow/lib/python3.6/site-packages/scvae/cli.py", line 697, in main
help="commands", dest="command", required=True)
File "/data/chenliang/anaconda3/envs/tensorflow/lib/python3.6/argparse.py", line 1707, in add_subparsers
action = parsers_class(option_strings=[], **kwargs)
TypeError: init() got an unexpected keyword argument 'required'

It seems to there has one bug in your cli.py file. Therefore can you tell me how i should do next? Thanks!