blocks|key|4168263|text|要做到这一点，其中一种方法是所讨论的应用程序正在广播UDP数据包，并且您的应用程序从不同的节点接收该数据包，然后显示该数据包。Twisted+Networking+Framework提供了执行此类工作的工具。文档还提供了一些简单的示例。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4168264|entityMap|0|LINK|mutability|MUTABLE|url|http://twistedmatrix.com/documents/current/core/howto/index.html^0|1R|S|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

One of the ways to do this would be the Application under question is broadcasting UDP packets and your application is receiving that from different nodes and then displaying it. <a href="http://twistedmatrix.com/documents/current/core/howto/index.html" rel="noreferrer">Twisted Networking Framework</a> provides facilities for doing such a job. The documentation provides some simple examples too.

blocks|key|387263|text|嗯，你可以用socket模块写点东西。不过，您必须有两个程序，一个在用户本地计算机上的服务器，然后是一个与服务器交互的客户端程序。服务器还将使用select模块来侦听多个连接。然后，您将拥有一个客户端程序，该程序在运行时或在您希望的任何时候向服务器发送某些内容。然后，服务器可以打印出它正在维护的连接，包括IP地址等详细信息。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|387264|这在这个链接上有非常好的记录，比你需要的要多，但它会像对我一样向你解释。http://ilab.cs.byu.edu/python/|offset|length|387265|entityMap|0|LINK|mutability|MUTABLE|url|http://ilab.cs.byu.edu/python/^0|0|10|U|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

Well, you could write something using the socket module. You would have to have two programs though, a server on the users local computer, and then a client program that would interface with the server. The server would also use the select module to listen for multiple connections. You would then have a client program that sends something to the server when it is run, or whenever you want it to. The server could then print out which connections it is maintaining, including the details such as IP address.

This is documented extremely well at this link, more so than you need but it will explain it to you as it did to me. <a href="http://ilab.cs.byu.edu/python/" rel="nofollow">http://ilab.cs.byu.edu/python/</a>

blocks|key|4168241|text|你可以尝试广播UDP，我在这里找到了一些例子：http://vizible.wordpress.com/2009/01/31/python-broadcast-udp/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4168242|entityMap|0|LINK|mutability|MUTABLE|url|http://vizible.wordpress.com/2009/01/31/python-broadcast-udp/^0|N|1P|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You can try broadcast UDP, I found some example here: <a href="http://vizible.wordpress.com/2009/01/31/python-broadcast-udp/" rel="nofollow">http://vizible.wordpress.com/2009/01/31/python-broadcast-udp/</a>

blocks|key|2699309|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2699310|您可以拥有一个基于服务器的解决方案:一个中央服务器，客户端在这里注册自己，并查询正在注册的其他客户端。|unordered-list-item|offset|length|style|BOLD|2699311|在点对点的设置中，可以使用像UDP广播这样的push技术，在这种情况下，每个客户端都会频繁地在网络上发送心跳数据包，供其他客户端接收。像socket这样的基本模块会对that.|2699312|Alternatively，有所帮助，您可以使用pull方法，在这种方法中，感兴趣的对等点需要主动发现其他模块。这可能是最不直接的。例如，您需要扫描网络，即找出哪些IP属于本地网络，并通过它们。然后您需要轮流联系每个IP。如果你的程序打开了一个TCP端口，你可以尝试连接到这个端口，并发现你的程序正在那里运行。如果您希望您的程序完全不了解这些查询，则可能需要打开到远程IP的ssh连接，并扫描程序的进程列表。所有这些都可能涉及到各种模块和库。您可能想要查看execnet.|2699313|2699314|entityMap|0|LINK|mutability|MUTABLE|url|http://codespeak.net/execnet/examples.html^0|0|9|4|0|M|4|0|O|4|6C|7|0|0|0^^$0|@$1|2|3|-4|4|5|6|U|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|V|7|@$D|W|E|X|F|G]]|8|@]|9|$]]|$1|H|3|I|4|C|6|Y|7|@$D|Z|E|10|F|G]]|8|@]|9|$]]|$1|J|3|K|4|C|6|11|7|@$D|12|E|13|F|G]]|8|@$D|14|E|15|1|16]]|9|$]]|$1|L|3|-4|4|5|6|17|7|@]|8|@]|9|$]]|$1|M|3|-4|4|5|6|18|7|@]|8|@]|9|$]]]|N|$O|$4|P|Q|R|9|$S|T]]]]

<ul>
<li>You can have a server-based solution: a central server where clients register themselves, and query for other clients being registered. A server framework like Twisted can help here.</li>
<li>In a peer-to-peer setting, push technologies like UDP broadcasts can be used, where each client is putting out a heartbeat packet ever so often on the network, for others to receive. Basic modules like socket would help with that.</li>
<li>Alternatively, you could go for a pull approach, where the interesting peer would need to discover the others actively. This is probably the least straight-forward. For one, you need to scan the network, i.e. find out which IPs belong to the local network and go through them. Then you would need to contact each IP in turn. If your program opens a TCP port, you could try to connect to this and find out your program is running there. If you want your program to be completely ignorant of these queries, you might need to open an ssh connection to the remote IP and scan the process list for your program. All this might involve various modules and libraries. One you might want to look at is <a href="http://codespeak.net/execnet/examples.html" rel="nofollow">execnet</a>.</li>
</ul>

I want to write a Python script that will check the users local network for other instances of the script currently running.

For the purposes of this question, let's say that I'm writing an application that runs solely via the command line, and will just update the screen when another instance of the application is "found" on the local network. Sample output below:

<pre><code>$ python question.py
Thanks for running ThisApp! You are 192.168.1.101.
 Found 192.168.1.102 running this application.
 Found 192.168.1.104 running this application.
</code></pre>

What libraries/projects exist to help facilitate something like this?

Decentralized networking in Python - How?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

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我想写一个Python脚本，它将检查用户本地网络中当前运行的脚本的其他实例。对于这个问题，假设我正在编写一个仅通过命令行运行的应用程序，当在本地网络上“找到”该应用程序的另一个实例时，该应用程序将仅更新屏幕。输出示例如下：$ python question.pyThanks for running ThisApp!  You are 192.168.1.101.  Found 192.168.1.

问Python中的去中心化网络-如何实现？
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