parameters: (self, other)
docstring: Update a set with the union of itself and another.
docstring_summary: Update a set with the union of itself and another.
docstring_tokens: Update a set with the union of itself and another .
function: def union_update(self, other):
          """Update a set with the union of itself and another."""
          self._update(other)
function_tokens: def union_update ( self , other ) : self . _update ( other )