Set routines

docs/reference:routines.set

Making proper sets

.. autosummary:: 
    :toctree:generated/
    unique
    unique_all
    unique_counts
    unique_inverse
    unique_values

.. autosummary:: 
    :toctree:generated/
    intersect1d
    isin
    setdiff1d
    setxor1d
    union1d