In learning to sword fight, Japanese samurai used wooden replica swords and medieval knights used blunt swords (which were safe enough to use on plate armour). However, lightsabers 'handle' very differently to a physical objects like sticks and swords; so how do Jedi (and Sith) learn and maintain their skills of lightsaber duelling?
Is there a non-lethal 'practice' lightsaber that can be used on a training partner safely? I know the movies backwards, and this is clearly not covered (apart from Luke training to block mini blaster shots from a floating droid, but that's a far cry from a lightsaber duel). On the other hand I have zero knowledge of any books and TV series. Is there is any of this material a clear depiction of Jedi (or Sith) learning to duel by 'sparring' in some way that emulates a real duel without the lethal danger?