twisted

I have an existing program that has its own main loop, and does computations based on input it receives - let's say from the user, to make it simple. I want to now do the computations remotely instead of locally, and I decided to implement the RPCs in Twisted. Ideally I just want to change one of my functions, say doComputation() , to make a call to twisted to perform the RPC, get the results, and return. The rest of the program should stay the same. How can I accomplish this, though? Twisted hijacks the main loop when I call reactor.run() . I also read that you don't really have threads in

In twisted's sourcecode, many docstrings contain formats like this: L{xxx} or C{xxx} or a line begin with an '@', what's their meanings? for example, in twisted/internet/interfaces.py: def registerProducer(producer, streaming): """ Register to receive data from a producer. ... For L{IPullProducer} providers, C{resumeProducing} will be called once each time data is required. ... @type producer: L{IProducer} provider ... @return: C{None} """ L{IPullProducer} , C{resumeProducing} , @type producer ? By the way, are these formats a part of standard python docstring formats? If so, where should I

Recently, I've been diving into the Twisted docs. From what I gathered, the basis of Twisted's functionality is the result of it's event loop called the "Reactor". The reactor listens for certain events and dispatches them to registered callback functions that have been designed to handle these events. In the book, there is some pseudo code describing what the Reactor does but I'm having trouble understanding it, it just doesn't make any sense to me. while True: timeout = time_until_next_timed_event() events = wait_for_events(timeout) events += timed_events_until(now()) for event in events:

I am trying to write a simple program using Twisted framework and I am struggling with resolving (or even with imaging how to write it) issue I couldnt find any relevant documentation for: The main reactor uses two factories, one custom, listening for TCP connections on given port (say, 8000) and second one, to log into given IRC server and channel. On receiving data (simple, one line text) on the factory listening at 8000, I need to pass that data to second factory, so it could be then processed accordingly - either send a message with that text to a channel, or a priv message to some person,

Deferred s are a great way to do asynchronous processing in Twisted. However, they, like the name implies, are for deferred computations, which only run and terminate once, firing the callbacks once. What if I have a repeated computation, like a button being clicked? Is there any Deferred -like object that can fire repeatedly, calling all callbacks attached to it whenever it is fired? I've set this up for now. For my limited use case it does what I want. class RepeatedDeferred: def __init__(self): self.callbacks = [] self.df = defer.Deferred() def addCallback(self, callback): self.callbacks

What is the closest Java alternative to Twisted ? Like Stephane, I would suggest you take a look at Mina . Its a framework for asynchronous network IO. It is built on top of NIO, which was mentioned earlier, and IMO hides away some of the complexity involved with Selectors,Channels,etc.. I've used Mina for a couple of projects and its pretty good, but be warned, I've found the documentation to be a little weak. And again, like Stephane mentioned, it doesn't have out of the box support for too many protocols. Nio is really low level and supports Socket only and SSL if you dig hard enough on

I'm scraping some pages with scrapy and get the following error: twisted.internet.error.ConnectionLost My command line output: 2015-05-04 18:40:32+0800 [cnproxy] INFO: Spider opened 2015-05-04 18:40:32+0800 [cnproxy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 2015-05-04 18:40:32+0800 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6023 2015-05-04 18:40:32+0800 [scrapy] DEBUG: Web service listening on 127.0.0.1:6080 2015-05-04 18:40:32+0800 [cnproxy] DEBUG: Retrying <GET http://www.cnproxy.com/proxy1.html> (failed 1 times): [<twisted.python.failure.Failure

I installed python 2.7.5 which is working fine. I then install scrapy (which, I think, uses twisted internally). My scrapy spider is also working fine. I installed twisted: sudo apt-get install python-twisted Then, I created a sample program using Echo Server code shown here Here is the code from twisted.internet import protocol, reactor class Echo(protocol.Protocol): def dataReceived(self, data): self.transport.write(data) class EchoFactory(protocol.Factory): def buildProtocol(self, addr): return Echo() reactor.listenTCP(1234, EchoFactory()) reactor.run() I try to run this code using this

- scrapy：爬虫框架 - 具有哪些功能：异步爬取，高性能的数据解析+持久化存储操作 - 框架：集成了很多功能且具有很强通用性的一个项目模板 - 如何学习框架： 　　- 学习框架爱的功能模块的具体使用 - 环境的安装： 　　- 1.pip3 install wheel 　　- 2.下载twisted http://www.lfd.uci.edu/~gohlke/pythonlibs/#twisted 　　- 3.进行下载目录，执行pip3 install Twisted‑19.7.0‑cp37‑cp37m‑win_amd64.whl 　　- 4.pip3 install pywin32 　　- 5.pip3 install scrapy - 使用流程： 　　- 创建一个工程：scrapy startproject firstBlood 　　- cd firstBlood 　　- 创建爬虫文件：scrapy genspider first www.xxx.com 来源： https://www.cnblogs.com/bilx/p/11575615.html

1)I want to devlop a website that has forums and chat. The chat and forums are linked in some way .Meaning for each thread the users can chat in the chat room for that thread or can post a reply to the forum. I was thinking of using django for forums and twisted for chat thing.Can i combine the two? The chat application devloped using twisted is linked to the forum. 2)If i use twisted and django what kind of web host shold i use while putting by website on web ?Shold i use a VPS? Or can i get a host that supports both? I would not combine the two per se; calls into Django would happen