好吧,假设我有一个继承Thread的工作类:
from threading import Thread
import time
class DoStuffClass(Thread):
def __init__(self, queue):
self. queue = queue
self.isstart = False
def startthread(self, isstart):
self.isstart = isstart
if isstart:
Thread.__init__(self)
else:
print 'Thread not started!'
def run(self):
while self.isstart:
time.sleep(1)
if self.queue.full():
y = self.queue.get() #y goes nowhere, it's just to free up the queue
self.queue.put('stream data')
我尝试在另一个文件中调用它并且它成功运行:
from Queue import Queue
import dostuff
q = Queue(maxsize=1)
letsdostuff= dostuff.DoStuffClass()
letsdostuff.startthread(True)
letsdostuff.start()
val = ''
i=0
while (True):
val = q.get()
print "Outputting: %s" % val
现在,我可以通过队列获取类输出的值。
我的问题:假设我想创建另一个继承DoStuffClass的类(ProcessStuff),以便我可以通过队列对象(或任何其他方法)获取DoStuffClass的输出,处理它,并将其传递给ProcessStuff的队列,以便调用ProcessStuff的代码可以通过排队获取其值。我该怎么做?
答案 0 :(得分:3)
听起来您并不希望ProcessStuff
继承DoStuffClass
,而是希望ProcessStuff
在内部使用DoStuffClass
队列。因此,不要使用继承,只需让ProcessStuff
在内部保留对DoStuffClass
实例的引用,并使用内部Queue
对象来获取DoStuffClass
生成的值:
class ProcessStuff(Thread):
def __init__(self, queue):
super(ProcessStuff, self).__init__()
self.queue = queue
self._do_queue = Queue() # internal Queue for DoStuffClass
self._do_stuff = dostuff.DoStuffClass(self._do_queue)
def run(self):
self._do_stuff.startthread(True)
self._do_stuff.start()
while True:
val = self._do_queue.get() # Grab value from DoStuffClass
# process it
processed_val = "processed {}".format(val)
self.queue.put(processed_val)
q = Queue(maxsize=1)
letsprocessstuff = ProcessStuff(q)
letsprocessstuff.start()
while (True):
val = q.get()
print "Outputting: %s" % val
输出:
Outputting: processed stream data
Outputting: processed stream data
Outputting: processed stream data
Outputting: processed stream data