如何实现线程间的通信?
我有一个线程,我在其中做一些事情,然后我需要从主程序线程中的对象调用一个方法,这个方法应该在主进程中执行:
class Foo():
def help(self):
pass
class MyThread(threading.Thread):
def __init__(self, connection, parser, queue=DEFAULT_QUEUE_NAME):
threading.Thread.__init__(self)
def run(self):
# do some work
# here I need to call method help() from Foo()
# but I need to call it in main process
bar = Foo()
my_work_thread = MyThread()
my_work_thread.run()
最佳答案
有很多可能性如何做到这一点,一种是使用 2 个队列:
from time import sleep
import threading, queue
class Foo():
def help(self):
print('Running help')
return 42
class MyThread(threading.Thread):
def __init__(self, q_main, q_worker):
self.queue_main = q_main
self.queue_worker = q_worker
threading.Thread.__init__(self)
def run(self):
while True:
sleep(1)
self.queue_main.put('run help')
item = self.queue_worker.get() # waits for item from main thread
print('Received ', item)
queue_to_main, queue_to_worker = queue.Queue(), queue.Queue( )
bar = Foo()
my_work_thread = MyThread(queue_to_main, queue_to_worker)
my_work_thread.start()
while True:
i = queue_to_main.get()
if i == "run help":
rv = Foo().help()
queue_to_worker.put(rv)
输出:
Running help
Received 42
Running help
Received 42
Running help
Received 42
...etc
关于python - 从另一个线程调用线程中的方法,python,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/51284652/