python解决哲学家就餐问题（死锁问题）

#哲学家就餐（解决死锁问题）
import threading,time
rlock1 = threading.RLock()
rlock2 = threading.RLock()
rlock3 = threading.RLock()
rlock4 = threading.RLock()
rlock5 = threading.RLock()
class Zhexuejia():
    def __init__(self,left,right):
        self.left = left
        self.right = right
z1 = Zhexuejia(rlock5,rlock1)
z2 = Zhexuejia(rlock1,rlock2)
z3 = Zhexuejia(rlock2,rlock3)
z4 = Zhexuejia(rlock3,rlock4)
z5 = Zhexuejia(rlock4,rlock5)


def run(z,name):
    f=z.left.acquire()
    if f:
        print(name,"获取左筷子")
    ff = z.right.acquire()
    if ff:
        print(name,"获取有筷子")
        print("哲学家开始就餐",name)
        time.sleep(1)
    z.right.release()
    z.left.release()

t1 = threading.Thread(target=run,args=(z1,"z1"))
t2 = threading.Thread(target=run,args=(z2,"z2"))
t3 = threading.Thread(target=run,args=(z3,"z3"))
t4 = threading.Thread(target=run,args=(z4,"z4"))
t5 = threading.Thread(target=run,args=(z5,"z5"))

t1.start()
t2.start()
t3.start()
t4.start()
t5.start()

结果：

z1 获取左筷子
z1 获取有筷子
哲学家开始就餐 z1
z3 获取左筷子
z3 获取有筷子
哲学家开始就餐 z3
z5 获取左筷子
z5 获取有筷子
z2 获取左筷子
哲学家开始就餐 z5
z2 获取有筷子
z4 获取左筷子
哲学家开始就餐 z2
z4 获取有筷子
哲学家开始就餐 z4

Process finished with exit code 0