python非同類間の呼び出し

#coding=utf-8
class Guns(object):
    def __init__(self):
        self.type = "M16"
        self.bulletnum = 30
        self.harm = 50

    def show_info(self):
        print 'the gunInfo type is:%s,bulletnum is:%s,harm is:%s' % (self.type, self.bulletnum, self.harm)

    def add_bullet(self, k=5):
        for v in xrange(k):
            self.bulletnum += 30
        print 'the gun bulletnum is:%d,now!' % self.bulletnum


class Person(object):
    def __init__(self):
        self.name = 'player1'
        self.blood = 100
        self.position = (0, 0)
        self.harm_people = []
        self.gun = Guns()

    def get_a_gun(self,gun):
        # print 'get a gunInfo is:%s,%s,%s' %(gun.type,gun.bulletnum,gun.harm)
        gun.show_info()


class Police(Person):
    def __init__(self):
        Person.__init__(self)
        self.name = 'Police'
        self.kill_index = 0
        self.pers = Thief()


    def shoot(self,gun,pers):
        if gun.bulletnum < 150:
            gun.add_bullet()
        #    
        gun.bulletnum -= 1
        pers.blood -= gun.harm
        if pers.blood <= 0:
            pers.isDead = True
            pers.killed_index += 1
            self.kill_index += 1
            self.harm_people.append(pers.name)
        print 'kill_index is:%d,harm_people is:%s' %(self.kill_index,self.harm_people)
        return self.kill_index,self.harm_people



class Thief(Person):
    def __init__(self):
        Person.__init__(self)
        self.name = 'thief'
        self.killed_index = 0
        self.isDead = False

    def show_thief_info(self):
        print 'thief blood is:%d,isDead is:%s,killed_index is:%d' %(self.blood,self.isDead,self.killed_index)





g = Guns()
p1 = Thief()
pers = Police()

def mainRun(g,p1):
    for x in xrange(10):
        p1.get_a_gun(g)
        p1.show_thief_info()
        if p1.isDead:
            print "the Thief has dead, stop shoot"
            break
        else:
            pers.shoot(g,p1)

mainRun(g,p1)
#