Python 扭曲-在线程中运行
python新手 新的扭曲 我的团队希望我让一些现有代码在单独的线程中运行 我想出了一个虚构的例子:Python 扭曲-在线程中运行,python,multithreading,twisted,Python,Multithreading,Twisted,python新手 新的扭曲 我的团队希望我让一些现有代码在单独的线程中运行 我想出了一个虚构的例子: from twisted.internet import threads, reactor from twisted.internet.defer import inlineCallbacks from time import sleep class SomeClass(object): def __init__(self): self.working = False
from twisted.internet import threads, reactor
from twisted.internet.defer import inlineCallbacks
from time import sleep
class SomeClass(object):
def __init__(self):
self.working = False
def set_working(self, is_working):
self.working = is_working
print 'Flag set to {}'.format(is_working)
@inlineCallbacks
def do_worker_thread(self):
# I want to make this call on the main thread
self.set_working(True)
# I want to do all this garbage on a separate thread and keep trucking on the main thread
# This mimics some calls in the real code. There is a call to deferToThread and a try
# except block there.
def thread_proc():
try:
for i in range(0, 100):
print 'Step %d starting'.format(i)
self.execute_step(i)
except Exception:
print 'An exception happened'
reactor.callInThread(thread_proc)
# When the worker thread is done, I want to call back 'on_thread_work_done'
def execute_step(self, num):
sleep(num)
print 'Worker thread: %d'.format(num)
def on_thread_work_done(self):
"""I want to be called back when the worker thread is done"""
self.set_working(False)
@inlineCallbacks
def do_main_thread(self):
for c in range(ord('a'), ord('z')+1):
sleep(c)
print 'Main thread: {}'.format(c)
if __name__ == "__main__":
someClass = SomeClass()
result = someClass.do_worker_thread()
result.addCallback(someClass.do_main_thread())
reactor.run()
do_worker_线程上的内容当前在主线程上运行。我在那里放了一条评论,我希望它在一个单独的线程中运行。do_worker_线程立即返回非常重要
我希望输出看起来像:
Flag set to True
Step 0 starting
Main thread: a
Worker thread: 0
Worker thread: 1
Main thread: b
Worker thread: 2
Main thread: c
...
如何更改do_worker_线程中的内容,以便我的set_working调用位于主线程上,并且在worker线程完成其工作之前不会设置为False?您可以使用或。尝试一下。它使用
callFromThread()
来安排主线程上的工作
from twisted.internet import threads, reactor
from twisted.internet.defer import inlineCallbacks, returnValue
from time import sleep
class SomeClass(object):
def __init__(self):
self.working = False
def set_working(self, is_working):
self.working = is_working
print 'Flag set to {}'.format(is_working)
@inlineCallbacks
def do_worker_thread(self):
# I want to make this call on the main thread
self.set_working(True)
# I want to do all this garbage on a separate thread and keep trucking on the main thread
# This mimics some calls in the real code. There is a call to deferToThread and a try
# except block there.
def thread_proc():
try:
for i in xrange(0, 10):
print 'Step {} starting'.format(i)
self.execute_step(i)
except Exception:
print 'An exception happened'
yield threads.deferToThread(thread_proc)
# When the worker thread is done, I want to call back 'on_thread_work_done'
self.on_thread_work_done()
returnValue(17)
def execute_step(self, num):
sleep(1)
print 'Worker thread: {}'.format(num)
def on_thread_work_done(self):
"""I want to be called back when the worker thread is done"""
self.set_working(False)
def do_main_thread(self):
for i in [chr(x) for x in range(ord('a'), ord('z')+1)]:
print 'Main thread: {}'.format(i)
sleep(1)
def thread_done(self, result):
print 'Thread done: {}'.format(result)
if __name__ == "__main__":
someClass = SomeClass()
# Schedule the threaded work
result = someClass.do_worker_thread().addCallback(someClass.thread_done)
# Schedule the main thread work
reactor.callFromThread(someClass.do_main_thread)
reactor.run()