Py.SetInterface for Python values of type Set.
val check : Object.t -> boolcheck o returns true if o is a Python set.
val clear : Object.t -> unitWrapper for PySet_Clear
Wrapper for PySet_Contains
Wrapper for PySet_Discard
val size : Object.t -> intWrapper for PySet_Size
to_list_map f o returns the list of f v for all elements v in Python set o.
of_list l returns then Python set containing all elements from l.