better item save

class Item:
    # stuff....

    def save(self, is_equipped: bool=False, in_inventory: bool=False, player_name: str=None):
        filename = ''
        if player_name is None:
            os.makedirs(settings.INSTANCE_DIR, 0o755, True)
            filename = os.path.join(settings.INSTANCE_DIR, '%d.json' % self.instance_id)
        else:
            if is_equipped:
        pathname = os.path.join(settings.PLAYER_DIR, player_name[0].capitalize(), player_name.capitalize(), 'equipment')
        elif in_inventory:
        pathname = os.path.join(settings.PLAYER_DIR, player_name[0].capitalize(), player_name.capitalize(), 'inventory')
        else:
                pathname = os.path.join(settings.PLAYER_DIR, player_name[0].capitalize(), player_name.capitalize())
            os.makedirs(pathname, 0o755, True)
            filename = os.path.join(pathname, '%s.json' % player_name.capitalize())

        js = self.to_json(outer_encoder=instance.to_json)
        with open(filename, 'w') as fp:
            fp.write(js)

        if self.inventory:
            for k in self.inventory:
                k.save(is_equipped, in_inventory, player_name)