(self, other)
return None
This function should only be used internally

        See Set._union for docstring
This function should only be used internally
This function should only be used internally
def _union(self, other):
        """
        This function should only be used internally

        See Set._union for docstring
        """
        if other.is_FiniteSet:
            return FiniteSet(*(self._elements | other._elements))

        # If other set contains one of my elements, remove it from myself
        if any(other.contains(x) is True for x in self):
            return set((
                FiniteSet(x for x in self if other.contains(x) is not True),
                other))

        return None
def _union ( self , other ) : if other . is_FiniteSet : return FiniteSet ( * ( self . _elements | other . _elements ) ) # If other set contains one of my elements, remove it from myself if any ( other . contains ( x ) is True for x in self ) : return set ( ( FiniteSet ( x for x in self if other . contains ( x ) is not True ) , other ) ) return None