Number of arguments is changing [on hold]

I am trying to make a method get_input with three arguments:

def get_input(self,player,inmate):
    if player.playing == True:
        if player.hit_points < 1:
            player.events.append("The "+ player.name +" has killed you!")
            print "You were killed!"
            player.die()
    if inmate.playing == True:
        if inmate.hit_points < 1:
            inmate.events.append("The "+ player.name +" has killed you!")
            print "You killed the " + inmate.name + "!"
            inmate.die()
    return raw_input(">")

When I call the method in another file, like this:

def do_input(self):
    get_input_from = [thing for room in self.rooms for thing in room.here if 'get_input' in dir(thing)]
    for thing in get_input_from:
        thing.events = []
        thing.input = thing.get_input(self.player,self.inmate)

It says:

Traceback (most recent call last):
  File "/Users/Jeffery/Desktop/Programming/BattleStation/Game.py", line 65, in <module>
game.run()
File "/Users/Jeffery/Desktop/Programming/BattleStation/Game.py", line 61, in run
self.do_input()
File "/Users/Jeffery/Desktop/Programming/BattleStation/Game.py", line 54, in do_input
thing.input = thing.get_input(self.player,self.inmate)
TypeError: get_input() takes exactly 1 argument (3 given)

and when I remove the arguments and call it, it says

Traceback (most recent call last):
File "/Users/Jeffery/Desktop/Programming/BattleStation/Game.py", line 65, in <module>
game.run()
File "/Users/Jeffery/Desktop/Programming/BattleStation/Game.py", line 61, in run
self.do_input()
File "/Users/Jeffery/Desktop/Programming/BattleStation/Game.py", line 54, in do_input
thing.input = thing.get_input()
TypeError: get_input() takes exactly 3 arguments (1 given)

How is the number of arguments get_input takes changing, and how do I fix it?