我想创建一个自定义线程池,以便对代码进行更多控制,以满足将来的需求。到目前为止,我还无法编写功能。我希望线程与主解释程序分开工作。我不需要多核优势。 Threads(Worker)应该侦听队列大小的更改并在传递的作业上运行execute。我无法使此代码正常工作。有人看到任何解决方案可以做到这一点吗?
import queue
from threading import Thread
import time
import random
class Worker(Thread):
#----------------------------------------------------------
def __init__(self,queue,x):
Thread.__init__(self)
self.run = True
self.queue = queue
self.x = x
#----------------------------------------------------------
def run(self):
while self.run:
while not self.queue.empty():
job = self.queue.get()
print("Starting", job, self.x)
job.executeJob()
time.sleep(0.1)
self.queue.task_done()
time.sleep(0.1)
class TestJob:
def __init__(self,x):
self.x = x
def execute(self):
print(f"Num {self.x}")
class DownloadManager:
def __init__(self,numOfThread):
self.jobQueue = queue.Queue()
self.numOfThread = numOfThread
self.threadList = [Worker(self.jobQueue, x) for x in range(0, self.numOfThread)]
[x.start() for x in self.threadList]
print("End of init")
def addJob(self,job):
self.jobQueue.put(job)
dm = DownloadManager(2)
for x in range(0,10):
job = TestJob(x)
dm.addJob(job)
print("After adding all jobs")
input("Waiting for enter")
print("Done")
控制台输出
Exception in thread Thread-1:
End of init
Traceback (most recent call last):
After adding all jobs
File "C:\Users\User\AppData\Local\Programs\Python\Python37\lib\threading.py", line 917, in _bootstrap_inner
self.run()
TypeError: 'bool' object is not callable
Waiting for enterException in thread Thread-2:
Traceback (most recent call last):
File "C:\Users\User\AppData\Local\Programs\Python\Python37\lib\threading.py", line 917, in _bootstrap_inner
self.run()
TypeError: 'bool' object is not callable
Done
我的Python版本是3.7.2。
答案 0 :(得分:3)
您的Worker
类具有run
的2个属性。
class Worker(Thread):
#----------------------------------------------------------
def __init__(self,queue,x):
...
self.run = True
...
#----------------------------------------------------------
def run(self):
while self.run:
...
一个是布尔值(self.run = True
),一个是函数(def run(self):
)。
You can't have both a method and an attribute with the same name.
根据错误消息,正在调用self.run()
,因此run
应该是一个函数。尝试将属性self.run
更改为其他名称(例如self.is_running
)。