python - Invoking base methods in classes

Question

I'm working on a game, and one of the things I want to do is to have a base class that defines an attribute damage, and uses a constructor to initiate that value. This is my base class

class Weapon(object):
def __init__(self, damage):
    self.damage = damage

This is the actual class that calls on Weapon for the game

class Crossbow(Weapon):
is_loaded = True
reloads = 5
def __init__(self, is_loaded, reloads):
    super(Crossbow, self).__init__()
    self.is_loaded = is_loaded
    self.reloads = reloads

def reload(self):
    print "You need to reload, before you can fire again"
    time.sleep(2)
    if reloads > 0:
        print "Reloading bow"
        time.sleep(2)
        reloads -= 1
        is_loaded = True
        print "Successfully reloaded bow"
        time.sleep(1)
        print "You now have",reloads,"arrow left"
        time.sleep(2)
    else:
        print "You don't have any more arrows"
        time.sleep(2)

I was testing the reload function using:

c = Crossbow(Weapon)
for i in range(1,6):
    c.reload()

The reason I run the class method 6 times, is that I wanted to test the reload variable which counts how many times you reload. It subtracts each time it counts, and once it reaches zero, it doesn't let you reload, so 6 times would be able to test the full functionality. However, when I run that block of code, I get this error:

me.py", line 47, in <module>
c = Crossbow(Weapon)
TypeError: __init__() takes exactly 3 arguments (2 given)

I've used classes before, but I'm new to creating a base class and constructor and calling other classes off of that. If someone could help me understand my problem, I would very much appreciate it.