#!/usr/bin/python
import time
from array import *
THINKING = 0
HUNGRY = 1
EATING = 2
class Philosopher:
def __init__(self):
self.ph = array('i',[1, 2, 3, 4, 5])
self.sleeptime = array('i',[30, 30, 30, 30, 30])
def initialization_code(self):
for i in range(self.ph.__len__()):
self.ph[i] = THINKING
def pickup(self,i):
self.ph[i] = HUNGRY
self.test(i)
if(EATING not in (self.ph[i])):
while(EATING not in (self.ph[i])):
time.sleep(self.sleeptime[i])
def putdown(self,i):
self.ph[i] = THINKING
self.test((i+4)%5)
self.test((i+1)%5)
def test(self,i):
if((2 not in (self.ph[(i+4)%5]))and(2 not in (self.ph[(i+1)%5]))and(self.ph[i]==HUNGRY)):
self.ph[i] = EATING
def start_process(self):
for i in range(self.ph.__len__()):
self.pickup(i)
self.putdown(i)
def display_status(self):
for i in range(self.ph.__len__()):
if (self.ph[i] == 0):
print "%d is THINKING" % i+1
elif (self.ph[i] == 1):
print "%d is WAITING" % i+1
elif (self.ph[i] == 2):
print "%d is EATING" % i+1
phil = Philosopher()
phil.initialization_code()
phil.start_process()
phil.display_status()
以上是我嘗試在python中實現dining哲學家問題的一段代碼。 當我運行這段代碼就說明我這個錯誤:TypeError:'int'類型的參數是不可迭代的
Traceback (most recent call last):
File "dining.py", line 59, in <module>
phil.start_process()
File "dining.py", line 43, in start_process
self.pickup(i)
File "dining.py", line 27, in pickup
self.test(i)
File "dining.py", line 38, in test
if((2 not in (self.ph[(i+4)%5]))and(2 not in (self.ph[(i+1)%5]))and(self.ph[i]==HUNGRY)):
TypeError: argument of type 'int' is not iterable
任何人都可以請幫我在這,爲什麼會出這個錯誤。我搜索了它,但無法解決。 在此先感謝!
此外,爲什麼'self.ph .__ len __()'而不是'len(self.ph)'? – glglgl
感謝您的回覆,我已經遇到了這個錯誤,現在解決方案運行良好 – user1479198