Allow the used to set the value of the partition_size and dask.n_workers

[sphinx] Polished documentation

[py] Fixed rebasing
2 jobs for explicity-dask in 6 minutes and 5 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #218863
docker
build_linux_37

00:05:59

84.0%
passed #218862
macosx
build_macosx_37

00:05:10

84.0%