entityMap|blocks|key|fug0i|text|您已经将一个进程绑定到默认端口(8000)。如果您以前已经运行过相同的模块，那么很可能该进程仍然绑定到端口。尝试先找到另一个进程：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5pcgc|$+ps+-fA+%7C+grep+python
++501+81651+12648+++0++9:53PM+ttys000++++0:00.16+python+-m+SimpleHTTPServer|code-block|syntax|javascript|135lt|其中包含了命令参数，因此您可以发现正在运行的命令|apoi8|如果不止一个|9fmk0|进程处于活动状态。您可能想测试一下|atm98|仍然显示本地文件的目录列表。|76l34|第二个数字是进程号；通过向服务器发送一个信号来停止它：|3apsd|kill+81651|1f6cb|这将发送一个标准|2ge2q|如果进程没有响应，您可能不得不求助于更严格的方法，如发送|fnhgg|(|27t9|或者|c5akg|)信号。请参见|fur8m|维基百科获取更多详细信息|7fbes|..。|l35h|或者，在|arcfh|不同|el610|端口，方法是在命令行上指定替代端口：|7emvb|$+python+-m+SimpleHTTPServer+8910
Serving+HTTP+on+0.0.0.0+port+8910+...|2pgo2|然后以如下方式访问服务器：|diani|；其中|2rgma|可以是1024及以上的任何数字，前提是端口尚未占用。^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|1L|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|1M|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|1N|9|@]|A|@]|B|$]]|$2|J|4|K|6|7|8|1O|9|@]|A|@]|B|$]]|$2|L|4|M|6|7|8|1P|9|@]|A|@]|B|$]]|$2|N|4|O|6|7|8|1Q|9|@]|A|@]|B|$]]|$2|P|4|Q|6|7|8|1R|9|@]|A|@]|B|$]]|$2|R|4|S|6|E|8|1S|9|@]|A|@]|B|$F|G]]|$2|T|4|U|6|7|8|1T|9|@]|A|@]|B|$]]|$2|V|4|W|6|7|8|1U|9|@]|A|@]|B|$]]|$2|X|4|Y|6|7|8|1V|9|@]|A|@]|B|$]]|$2|Z|4|10|6|7|8|1W|9|@]|A|@]|B|$]]|$2|11|4|12|6|7|8|1X|9|@]|A|@]|B|$]]|$2|13|4|14|6|7|8|1Y|9|@]|A|@]|B|$]]|$2|15|4|16|6|7|8|1Z|9|@]|A|@]|B|$]]|$2|17|4|18|6|7|8|20|9|@]|A|@]|B|$]]|$2|19|4|1A|6|7|8|21|9|@]|A|@]|B|$]]|$2|1B|4|1C|6|7|8|22|9|@]|A|@]|B|$]]|$2|1D|4|1E|6|E|8|23|9|@]|A|@]|B|$F|G]]|$2|1F|4|1G|6|7|8|24|9|@]|A|@]|B|$]]|$2|1H|4|1I|6|7|8|25|9|@]|A|@]|B|$]]|$2|1J|4|1K|6|7|8|26|9|@]|A|@]|B|$]]]]

You already have a process bound to the default port (8000). If you already ran the same module before, it is most likely that process still bound to the port. Try and locate the other process first:

<pre><code>$ ps -fA | grep python
 501 81651 12648 0 9:53PM ttys000 0:00.16 python -m SimpleHTTPServer
</code></pre>

The command arguments are included, so you can spot the one running <code>SimpleHTTPServer</code> if more than one <code>python</code> process is active. You may want to test if <code>http://localhost:8000/</code> still shows a directory listing for local files.

The second number is the process number; stop the server by sending it a signal:

<pre><code>kill 81651
</code></pre>

This sends a standard <code>SIGTERM</code> signal; if the process is unresponsive you may have to resort to tougher methods like sending a <code>SIGKILL</code> (<code>kill -s KILL &lt;pid&gt;</code> or <code>kill -9 &lt;pid&gt;</code>) signal instead. See <a href="https://en.wikipedia.org/wiki/Unix_signal#POSIX_signals" rel="noreferrer">Wikipedia for more details</a>.

Alternatively, run the server on a different port, by specifying the alternative port on the command line:

<pre><code>$ python -m SimpleHTTPServer 8910
Serving HTTP on 0.0.0.0 port 8910 ...
</code></pre>

then access the server as <code>http://localhost:8910</code>; where <code>8910</code> can be any number from 1024 and up, provided the port is not already taken.

entityMap|blocks|key|2apme|text|使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|hgor|sudo+lsof+-i:5000|code-block|syntax|javascript|4j0kd|这将为您提供使用该端口的进程列表。给出进程列表后，使用PID列上的id终止进程使用|3ufda|kill+379+#use+the+provided+PID^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|M|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|N|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|O|9|@]|A|@]|B|$F|G]]]]

Use

<pre><code> sudo lsof -i:5000
</code></pre>

This will give you a list of processes using the port if any. 
Once the list of processes is given, use the id on the PID column to terminate the process use

<pre><code> kill 379 #use the provided PID
</code></pre>

entityMap|blocks|key|e61q|text|简单的一行命令来摆脱它，在终端中输入以下命令，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|98mhp|ps+-a|code-block|syntax|javascript|1d4ha|这将列出Python正在使用的所有进程、checkout，并在终端中输入以下命令，|6fgsd|kill+-9+(processID)|3sjbu|例如kill+-9+33178^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|N|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|O|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|P|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|Q|9|@]|A|@]|B|$F|G]]|$2|L|4|M|6|7|8|R|9|@]|A|@]|B|$]]]]

Simple one line command to get rid of it, type below command in terminal,

<pre><code>ps -a
</code></pre>

This will list out all process, checkout which is being used by Python and type bellow command in terminal,

<pre><code>kill -9 (processID) 
</code></pre>

For example kill -9 33178

entityMap|blocks|key|35gao|text|顺便说一句，为了从一开始就防止这种情况发生，只需在SimpleHTTPServer仍在正常运行的情况下在终端中按Ctrl%2BC即可。这将“正确地”停止服务器并释放端口，这样您就不必在重新启动服务器之前再次找到并终止进程。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|bdopc|(Mods:我确实试着把这条评论放在它属于的最佳答案上，但我没有足够的声誉。)^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|E|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|F|9|@]|A|@]|B|$]]]]

By the way, to prevent this from happening in the first place, simply press <kbd>Ctrl</kbd>+<kbd>C</kbd> in terminal while SimpleHTTPServer is still running normally. This will "properly" stop the server and release the port so you don't have to find and kill the process again before restarting the server.

(Mods: I did try to put this comment on the best answer where it belongs, but I don't have enough reputation.)

entityMap|blocks|key|57c7r|text|您可以允许服务器使用以下命令重用地址|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4h22t|..。|2dtcr|服务器是否允许重用地址。默认设置为|6qo6|，并且可以在子类中进行设置以更改策略。|b2iml|import+SimpleHTTPServer,+SocketServer
PORT+=+8000
httpd+=+SocketServer.TCPServer(("",+PORT),+SimpleHTTPServer.SimpleHTTPRequestHandler)
httpd.allow_reuse_address+=+True
print+"Serving+at+port",+PORT
httpd.serve_forever()|code-block|syntax|javascript^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|N|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|O|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|P|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|Q|9|@]|A|@]|B|$]]|$2|I|4|J|6|K|8|R|9|@]|A|@]|B|$L|M]]]]

You can allow the server to reuse an address with <a href="https://docs.python.org/2/library/socketserver.html#SocketServer.BaseServer.allow_reuse_address" rel="noreferrer"><code>allow_reuse_address</code></a>.

<blockquote>
 Whether the server will allow the reuse of an address. This defaults to <code>False</code>, and can be set in subclasses to change the policy.
</blockquote>

<pre><code>import SimpleHTTPServer, SocketServer
PORT = 8000
httpd = SocketServer.TCPServer(("", PORT), SimpleHTTPServer.SimpleHTTPRequestHandler)
httpd.allow_reuse_address = True
print "Serving at port", PORT
httpd.serve_forever()
</code></pre>

entityMap|blocks|key|2ur0s|text|您还可以在下一个最高可用端口上提供服务，在Python中执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4bkg1|import+SimpleHTTPServer
import+SocketServer

Handler+=+SimpleHTTPServer.SimpleHTTPRequestHandler

port+=+8000
while+True:
++++try:
++++++++httpd+=+SocketServer.TCPServer(('',+port),+Handler)
++++++++print+'Serving+on+port',+port
++++++++httpd.serve_forever()
++++except+SocketServer.socket.error+as+exc:
++++++++if+exc.args[0]+!=+48:
++++++++++++raise
++++++++print+'Port',+port,+'already+in+use'
++++++++port+%2B=+1
++++else:
++++++++break|code-block|syntax|javascript|ck7fh|如果您需要对其他实用程序执行相同的操作，则使用bash脚本可能更方便：|6uvob|#!/usr/bin/env+bash

MIN_PORT=${1:-1025}
MAX_PORT=${2:-65535}

(netstat+-atn+%7C+awk+'{printf+"%25s\n%25s\n",+$4,+$4}'+%7C+grep+-oE+'[0-9]*$';+seq+"$MIN_PORT"+"$MAX_PORT")+%7C+sort+-R+%7C+head+-n+1|9684b|将其设置为可执行文件，其名称为|dlb42|你可以这样做：|fcrv6|someprogram+--port=$(get-free-port)|cr6of|这不如原生Python方法可靠，因为bash脚本不会捕获端口--另一个进程可以在您的进程捕获端口之前抢占端口(竞态条件)+--但是在使用没有自己的try-try-a方法的实用程序时，这种方法可能仍然足够有用。^0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|T|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|U|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|V|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|W|9|@]|A|@]|B|$F|G]]|$2|L|4|M|6|7|8|X|9|@]|A|@]|B|$]]|$2|N|4|O|6|7|8|Y|9|@]|A|@]|B|$]]|$2|P|4|Q|6|E|8|Z|9|@]|A|@]|B|$F|G]]|$2|R|4|S|6|7|8|10|9|@]|A|@]|B|$]]]]

You can also serve on the next-highest available port doing something like this in Python:

<pre><code>import SimpleHTTPServer
import SocketServer

Handler = SimpleHTTPServer.SimpleHTTPRequestHandler

port = 8000
while True:
 try:
 httpd = SocketServer.TCPServer(('', port), Handler)
 print 'Serving on port', port
 httpd.serve_forever()
 except SocketServer.socket.error as exc:
 if exc.args[0] != 48:
 raise
 print 'Port', port, 'already in use'
 port += 1
 else:
 break
</code></pre>

If you need to do the same thing for other utilities, it may be more convenient as a bash script:

<pre><code>#!/usr/bin/env bash

MIN_PORT=${1:-1025}
MAX_PORT=${2:-65535}

(netstat -atn | awk '{printf "%s\n%s\n", $4, $4}' | grep -oE '[0-9]*$'; seq "$MIN_PORT" "$MAX_PORT") | sort -R | head -n 1
</code></pre>

Set that up as a executable with the name <code>get-free-port</code> and you can do something like this:

<pre><code>someprogram --port=$(get-free-port)
</code></pre>

That's not as reliable as the native Python approach because the bash script doesn't capture the port -- another process could grab the port before your process does (race condition) -- but still may be useful enough when using a utility that doesn't have a try-try-again approach of its own.

entityMap|blocks|key|25c2m|text|我是Python的新手，但在我简短的研究之后，我发现这是典型的套接字被绑定。碰巧套接字仍在使用中，您可能需要等待才能使用它。或者，您可以只添加：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|df83v|tcpSocket.setsockopt(socket.SOL_SOCKET,+socket.SO_REUSEADDR,+1)|code-block|syntax|javascript|4rckf|这将使端口在较短的时间内可用。在我的例子中，它使端口几乎立即可用。^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|J|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|K|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|L|9|@]|A|@]|B|$]]]]

I am new to Python, but after my brief research I found out that this is typical of sockets being binded. It just so happens that the socket is still being used and you may have to wait to use it. Or, you can just add:

<pre><code>tcpSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
</code></pre>

This should make the port available within a shorter time. In my case, it made the port available almost immediately.

entityMap|blocks|key|fmqcn|text|以防上面的解决方案不起作用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|7of2u|获取您的进程正在侦听的端口：|fph8e|$+ps+ax+%7C+grep+python|35thc|终止进程|kvtp|$+kill进程|9bfkd|_|5pvr5|名称^0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|O|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|P|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|Q|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|R|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|S|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|T|9|@]|A|@]|B|$]]|$2|M|4|N|6|7|8|U|9|@]|A|@]|B|$]]]]

Just in case above solutions didn't work:

<ol>
<li>Get the port your process is listening to:

$ ps ax | grep python</li>
<li>Kill the Process

$ kill PROCESS_NAME</li>
</ol>

entityMap|blocks|key|54p6o|text|我有一个raspberry+pi，我使用的是python+web服务器(使用Flask)。我已经尝试了上面的所有方法，唯一的解决方案是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|168j6|关闭终端(Shell)|efehe|然后再打开它。或者|4g8gn|重新启动树莓派|593v2|，因为没有什么能阻止that服务器...^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|K|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|L|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|M|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|N|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|O|9|@]|A|@]|B|$]]]]

I have a raspberry pi, and I am using python web server (using Flask). I have tried everything above, the only solution is to close the terminal(shell) and open it again. Or restart the raspberry pi, because nothing stops that webserver...

entityMap|blocks|key|28em5|text|对于任何开发人员来说，这都是经常发生的用例。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|dfv09|最好将其作为本地系统中的函数。(因此，根据用户偏好，最好将此脚本保存在一个shell配置文件中，如ksh/zsh或bash配置文件)|796u9|function+killport+{
+++kill+-9+`lsof+-i+tcp:"$1"+%7C+grep+LISTEN+%7C+awk+'{print+$2}'`
}|code-block|syntax|javascript|dv8dr|用法：|829hk|killport+port_number|c0o7p|示例：|7u18o|killport+8080^0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|R|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|S|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|T|9|@]|A|@]|B|$H|I]]|$2|J|4|K|6|7|8|U|9|@]|A|@]|B|$]]|$2|L|4|M|6|G|8|V|9|@]|A|@]|B|$H|I]]|$2|N|4|O|6|7|8|W|9|@]|A|@]|B|$]]|$2|P|4|Q|6|G|8|X|9|@]|A|@]|B|$H|I]]]]

This commonly happened use case for any developer.
It is better to have it as function in your local system. (So better to keep this script in one of the shell profile like ksh/zsh or bash profile based on the user preference)
<pre><code>function killport {
 kill -9 `lsof -i tcp:&quot;$1&quot; | grep LISTEN | awk '{print $2}'`
}
</code></pre>
Usage:
<pre><code>killport port_number
</code></pre>
Example:
<pre><code>killport 8080
</code></pre>

entityMap|blocks|key|387vf|text|添加到下面的答案中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5b2r3|迈克尔·施密德|3uns6|刚刚遇到了问题，为了允许端口使用的重新绑定，需要像这样对套接字服务器进行子类化：|db0dl|from+socketserver+import+TCPServer,+BaseRequestHandler
from+typing+import+Tuple,+Callable
class+MySockServer(TCPServer):
++++def+__init__(self,+server_address:+Tuple[str,+int],+RequestHandlerClass:+Callable[...,+BaseRequestHandler]):
++++++++self.allow_reuse_address+=+True
++++++++super().__init__(server_address,+RequestHandlerClass)|code-block|syntax|javascript|58f9p|因为在实例化之后，没有必要更改该标志。然后使用它，而不是TCPServer或您正在使用的任何东西。^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|N|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|O|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|P|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|Q|9|@]|A|@]|B|$J|K]]|$2|L|4|M|6|7|8|R|9|@]|A|@]|B|$]]]]

Adding to the answer from <a href="https://stackoverflow.com/a/58611735/1863432">Michael Schmid</a>
Just had the problem, to allow rebinding of the port use needs to SUBCLASS the socket server like this:
<pre><code>from socketserver import TCPServer, BaseRequestHandler
from typing import Tuple, Callable
class MySockServer(TCPServer):
 def __init__(self, server_address: Tuple[str, int], RequestHandlerClass: Callable[..., BaseRequestHandler]):
 self.allow_reuse_address = True
 super().__init__(server_address, RequestHandlerClass)
</code></pre>
because after instantiation, there is not point in changing that flag.
Then use it instead of TCPServer or whatever you are using.

I'm trying to set up a server with python from mac terminal. 

I navigate to folder location an use: 

<pre><code>python -m SimpleHTTPServer
</code></pre>

But this gives me error: 

<pre><code>socket.error: [Errno 48] Address already in use
</code></pre>

I had previously open a connection using the same command 
for a different website in a different location in my machine.

socket.error: [Errno 48] Address already in use

服务器

Python

 我正试着在mac终端上用python设置一个服务器。 我导航到文件夹位置并使用： python -m SimpleHTTPServer 但这给了我一个错误： socket.error: [Errno 48] Address already in use 我之前在我的机器中的不同位置使用相同的命令打开了一个不同网站的连接。

问socket.error：[Errno 48]地址已在使用中
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