Update 191113_umap_parallel/cluster_opt.py
Update 191113_umap_parallel/cluster_opt.py

Co-authored-by: Chaz Reid <df4771febe778fd0ce87f6f7290cf287ef79cb39@users.noreply.github.com>
theislab/scanpy_usage,theislab/scanpy_usage,theislab/scanpy_usage