getting a name error from my input

class Character:
    exp = 0
    hp = 10

    def get_weapon(self):
        weapon_choice = input("Weapon ([S]word, [A]xe, [B]ow): ").lower()
        if weapon_choice in "sab":
            if weapon_choice == 's':
                return 'sword'
            elif weapon_choice == 'a':
                return 'axe'
            else:
                return 'bow'
        else:
            return self.get_weapon


    def __init__(self, **kwargs):
        self.name = input("Name: ")
        self.weapon = self.get_weapon()

        for key, value in kwargs.items():
            setattr(self, key, value)

>>> player = Character()                                                                                                                    
Weapon ([S]word, [A]xe, [B]ow): S                                                                                                           
Traceback (most recent call last):                                                                                                          
  File "<stdin>", line 1, in <module>                                                                                                       
  File "char.py", line 20, in __init__                                                                                                      
    self.weapon = self.get_weapon()                                                                                                         
  File "char.py", line 6, in get_weapon                                                                                                     
    weapon_choice = input("Weapon ([S]word, [A]xe, [B]ow): ").lower()                                                                       
  File "<string>", line 1, in <module>                                                                                                      
NameError: name 'S' is not defined