bottle gevent和线程：gevent仅可用于单个线程

本文介绍了bottle gevent和线程：gevent仅可用于单个线程的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个使用线程的python瓶应用程序。由于我使用的是 monkey.patch ，这些线程阻止了应用执行（从线程触发的对话框阻止瓶路线响应客户端，直到被关闭。）

I have a python bottle application, which uses threads. due to the fact I'm using monkey.patch, the threads were blocking app execution (a dialog box fired from a thread was blocking bottle routes from responding to the client, until dismissed.)

此处的一项小研究表明，我应该使用猴子补丁而不要尝试补丁线程：

A little research here showed I should use monkey patch without trying to patch Thread:

# Patch python's threads with greenlets from gevent import monkey monkey.patch_all(thread=False)

这不会在最小的示例。我写过。

This does not block on a minimal example I wrote.

但是在与线程大量使用时会出现这些错误，使用像 threading.setEvent（） 这样的方法，这是我得到的错误：

But raises these errors on intensive use with Threads, with methods like threading.setEvent() This is the error I get:

C:\Users\IEUser\downloadloft-localserver>python mainserver.py Exception in thread Thread-1: Traceback (most recent call last): File "C:\Program Files\DownloadLoft\Python27\lib\threading.py", line 551, in _ _bootstrap_inner self.run() File "C:\Program Files\DownloadLoft\Python27\lib\threading.py", line 753, in r un self.finished.wait(self.interval) File "C:\Program Files\DownloadLoft\Python27\lib\threading.py", line 403, in w ait self.__cond.wait(timeout) File "C:\Program Files\DownloadLoft\Python27\lib\threading.py", line 262, in w ait _sleep(delay) File "c:\users\admini~1\appdata\local\temp\easy_install-sch3hm\gevent-0.13.8-p y2.7-win32.egg.tmp\gevent\hub.py", line 79, in sleep switch_result = get_hub().switch() File "c:\users\admini~1\appdata\local\temp\easy_install-sch3hm\gevent-0.13.8-p y2.7-win32.egg.tmp\gevent\hub.py", line 135, in get_hub raise NotImplementedError('gevent is only usable from a single thread') NotImplementedError: gevent is only usable from a single thread Bottle v0.12-dev server starting up (using GeventSocketIOServer())... Listening on localhost:8080/ Hit Ctrl-C to quit. Exception in thread Thread-2: Traceback (most recent call last): File "C:\Program Files\DownloadLoft\Python27\lib\threading.py", line 551, in _ _bootstrap_inner self.run() File "C:\Program Files\DownloadLoft\Python27\lib\threading.py", line 753, in r un self.finished.wait(self.interval) File "C:\Program Files\DownloadLoft\Python27\lib\threading.py", line 403, in w ait self.__cond.wait(timeout) File "C:\Program Files\DownloadLoft\Python27\lib\threading.py", line 262, in w ait _sleep(delay) File "c:\users\admini~1\appdata\local\temp\easy_install-sch3hm\gevent-0.13.8-p y2.7-win32.egg.tmp\gevent\hub.py", line 79, in sleep switch_result = get_hub().switch() File "c:\users\admini~1\appdata\local\temp\easy_install-sch3hm\gevent-0.13.8-p y2.7-win32.egg.tmp\gevent\hub.py", line 135, in get_hub raise NotImplementedError('gevent is only usable from a single thread') NotImplementedError: gevent is only usable from a single thread

是这是gevent.monkeypatch的已知问题？有任何想法吗？

Is this a known issue with gevent.monkeypatch? Any ideas?

推荐答案

瓶子应用程序是线程化的，所以您不能在瓶子路线中调用的任何函数中使用gevent。

Bottle applications are threaded, so you can't use gevent in any function called in bottle routes.

为帮助您，我需要推测您为什么使用线程。

To help you, I need to speculate why you use threads.

如果是为了加速您的酒瓶网站，请贾斯汀使用cherrypy服务器：

If it's to accelerate your bottle website, juste use the cherrypy server :

pip install cherrypy

（或者只是将当前目录中的cherrypy目录转储，这是一个纯Python服务器）

(or just dump the cherrypy dir in your current dir, it's a pure Python server)

然后运行您的bottle应用方式：

Then run your bottle app this way :

bottle.run(server='cherrypy')

如果是因为您希望在不阻止响应的情况下进行非阻止性调用（例如，获取URL），则很容易手动进行操作：

If it's because you want to make non blocking calls (such as fetching URLs) without blocking the response, it's easy enought to do it manually :

• 创建一个队列对象（这是一个特殊的队列，可以在线程之间填充并弹出）。
• 创建并运行一个无限while循环的线程取消弹出队列并每次执行操作时间。
• 当您需要无阻塞呼叫时，将操作推入队列并携带一个。