SQL Plus script to disable/enable all triggers an Oracle database

Below is an SQL Plus script to disable/enable all triggers for the current user in an Oracle database.  This is useful when importing data in an oracle database and you do not want triggers firing.  Substitute "DISABLE" below with "ENABLE" to enable back triggers after data import.

begin
  for c in (select * from user_triggers a where a.trigger_name not like '%$xd' )
  loop
      execute immediate('alter trigger '||c.trigger_name||' DISABLE');
  end loop;
end;