entityMap|blocks|key|9qb3m|text|通常，停止并重新启动该特定单元可以解决此问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data^0^^$0|$]|1|@$2|3|4|5|6|7|8|C|9|@]|A|@]|B|$]]]]

Usually, stopping and restarting that particular cell fixes this issue.

entityMap|blocks|key|cpp90|text|这意味着Jupyter仍在运行内核。你有可能在内核中运行一个无限循环，这就是它不能完成执行的原因。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|6s7sa|尝试通过按下顶部的停止按钮手动停止内核。如果这不起作用，中断它，并通过转到“内核”菜单重新启动它。这应该会断开它的连接。|easj2|否则，我建议关闭并重新打开笔记本。问题也可能出在你的代码上。^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|G|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|H|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|I|9|@]|A|@]|B|$]]]]

This means that Jupyter is still running the kernel. It is possible that you are running an infinite loop within the kernel and that is why it can't complete the execution. 

Try manually stopping the kernel by pressing the stop button at the top. If that doesn't work, interrupt it and restart it by going to the "Kernel" menu. This should disconnect it. 

Otherwise, I would recommend closing and reopening the notebook. The problem may also be with your code.

entityMap|blocks|key|9u3t8|text|我现在也有同样的问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|57v5f|通过以下方式解决了这个问题：|9hf6l|只需重新加载运行Python的本地the链接|apk3t|http://localhost:8888/notebooks/sec%25201/Untitled.ipynb|code-block|syntax|javascript^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|M|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|N|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|O|9|@]|A|@]|B|$J|K]]]]

I had the same issue now:

Solved it by:

Just reloading the local weblink in which the Python is running

<pre><code>http://localhost:8888/notebooks/sec%201/Untitled.ipynb
</code></pre>

entityMap|0|type|IMAGE|mutability|IMMUTABLE|data|imageUrl|https://ask.qcloudimg.com/http-save/actteam/771bd30f229ea2c9adbdbe60ec321ce4.jpg|imageAlt|blocks|key|3tdgc|text|​|unstyled|depth|inlineStyleRanges|entityRanges|9g1im|fbc86|?|atomic|offset|length|1a03i|2ejvc|9ln0p|这意味着你的程序仍然在后台运行，你需要点击关机(如附图所示)。|a279m|*|tq83|57jkq|bh96g|关闭正在运行的单元，然后再次运行您的程序。^0|0|0|0|1|0|0|0|0|0|0|0|0^^$0|$1|$2|3|4|5|6|$7|8|9|-4]]]|A|@$B|C|D|E|2|F|G|Z|H|@]|I|@]|6|$]]|$B|J|D|-4|2|F|G|10|H|@]|I|@]|6|$]]|$B|K|D|L|2|M|G|11|H|@]|I|@$N|12|O|13|B|14]]|6|$]]|$B|P|D|-4|2|F|G|15|H|@]|I|@]|6|$]]|$B|Q|D|E|2|F|G|16|H|@]|I|@]|6|$]]|$B|R|D|S|2|F|G|17|H|@]|I|@]|6|$]]|$B|T|D|U|2|F|G|18|H|@]|I|@]|6|$]]|$B|V|D|U|2|F|G|19|H|@]|I|@]|6|$]]|$B|W|D|U|2|F|G|1A|H|@]|I|@]|6|$]]|$B|X|D|Y|2|F|G|1B|H|@]|I|@]|6|$]]]]

<a href="https://i.stack.imgur.com/O8z6R.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/O8z6R.jpg" alt="enter image description here"></a>

This is mean your program is still running in background, you need to click shutdown (Shown in attached Image). 

*** Shutdown the Running cell and again run your program.

entityMap|blocks|key|dt547|text|我也有同样的问题。我发现必须运行ipython才能执行jupyter+notebook。执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|bgbtu|转到存放ipython笔记本的文件夹(.ipynb)|85htv|按住shift键并在空白处单击鼠标右键，然后选择“在此处打开命令窗口”。这将打开一个命令提示符窗口。|23jvh|类型|dtual|..。这将启动ipython。|b6tdf|打开另一个命令提示符窗口，然后打开jupyter+notebook。|3n0hs|再次打开您的文件并转到cell>>>run单元格。|fuu75|这应该是可行的。这对我很有效。干杯！^0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|Q|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|R|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|S|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|T|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|U|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|V|9|@]|A|@]|B|$]]|$2|M|4|N|6|7|8|W|9|@]|A|@]|B|$]]|$2|O|4|P|6|7|8|X|9|@]|A|@]|B|$]]]]

I had the same issue. I found that ipython must be running for jupyter notebook to execute.
Do the following:

<ul>
<li>Go to the folder where you have your ipython notebook(.ipynb)</li>
<li>Press shift and right click on the empty space then select "open command window here". This will open a command prompt window.</li>
<li>Type <code>ipython</code>. This will start ipython.</li>
<li>Open another command prompt window and open jupyter notebook.</li>
<li>Open your file again and go to cell>>>run cell.</li>
</ul>

This should work. It worked for me. Cheers!

entityMap|blocks|key|ccbl8|text|我已经用命令安装了jupyter|type|unstyled|depth|inlineStyleRanges|entityRanges|data|21lov|也有同样的问题。而我使用的是命令|217pc|问题已解决。^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|G|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|H|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|I|9|@]|A|@]|B|$]]]]

I have installed jupyter with command <code>pip3 install jupyter</code> and have the same problem. when instead I used the command <code>pip3 install jupyter ipython</code> the problem was fixed.

entityMap|blocks|key|28bdh|text|这是因为当我们运行一个循环直到它终止时，内核处于忙碌状态，所以在|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3da7i|就会出现。由于内核很忙，如果我们只是让该单元完全执行，并切换到另一个单元运行，相应的单元将变得繁忙，对于该单元也是如此|534jv|如图所示。在这种情况下，您只需重新启动您的jupyter笔记本电脑，然后一切正常。|9h46h|但请确保您的循环这次将终止，否则将再次出现此错误。^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|J|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|K|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|L|9|@]|A|@]|B|$]]]]

This is because when we run a loop until it's termination the Kernel is in busy state and so IN <code>[*]</code> is shown up. Since Kernel is busy and if we just leave that cell to execute completely and switch to another cell to run, the corresponding cell will get busy and so again for that cell <code>IN[*]</code> is shown.
In that case you just need to restart your jupyter notebook and all is fine then. 

But be sure that your loop will terminate this time or else again this error will turn up.

entityMap|blocks|key|6rms0|text|我遇到了同样的问题，上面提到的解决方案都不起作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|esq9q|直到我更新了conda包：|b140g|conda+update+conda
+conda+update+anaconda|code-block|syntax|javascript|epb1o|还有..。瞧！这一切都起作用了！^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|M|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|N|9|@]|A|@]|B|$H|I]]|$2|J|4|K|6|7|8|O|9|@]|A|@]|B|$]]]]

I had the same problem and not any of the above mentioned solutions worked.

Until I updated conda packages:

<pre><code> conda update conda
 conda update anaconda
</code></pre>

and ... Voila! It all works!

entityMap|blocks|key|74nqn|text|我已经卸载了jupyter、notebook和ipython，并安装了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|d1c5n|jupyterlab|21np1|..。它现在可以工作了(只安装了几个库和Python+3.6.8。|dfg3s|要丢弃的东西:完全卸载Python+3.7和他的库，并恢复到3.6不能修复它，尽管它改进了它，它现在断断续续地工作(但是一旦某些东西不能正常工作，事情开始变得越来越糟，所以我做了上面的事情)。^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|J|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|K|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|L|9|@]|A|@]|B|$]]]]

I have uninstalled jupyter, notebook and ipython, and installed jupyterlab. It is working for now (with just a few libraries installed and Python 3.6.8. 

<hr>

Something to discard: Uninstalling Python 3.7 completely with his libraries and reverting to 3.6 doesn't fix it, although it improves it, it works intermittently now (but once sth doesn't work properly, things start to get worse and worse, so I did the above).

entityMap|blocks|key|afro|text|pip+install+ipykernel+--upgrade|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|63eie|https://github.com/jupyter/notebook/issues/1133|unstyled^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$C|D]]|$2|E|4|F|6|G|8|I|9|@]|A|@]|B|$]]]]

<pre><code>pip install ipykernel --upgrade
</code></pre>

<a href="https://github.com/jupyter/notebook/issues/1133" rel="nofollow noreferrer">https://github.com/jupyter/notebook/issues/1133</a>

entityMap|blocks|key|dljp3|text|更新ipykernel为我做到了这一点。arch+linux的ipykernel包似乎已经过时一段时间了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|dirk2|只要做就行了|714nv|在此引用：|a775|github解决方案^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|J|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|K|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|L|9|@]|A|@]|B|$]]]]

updating ipykernel did it for me. it seems arch linux's ipykernel package had been outdated for some time

just do <code>pip install --upgrade ipykernel</code>

reference here: <a href="https://github.com/jupyter/jupyter_console/issues/163#issuecomment-418392676" rel="noreferrer">github solution</a>

entityMap|blocks|key|ebgvd|text|说明您的内核仍在执行单元中的代码的答案是正确的。你可以通过右上角的小圆圈看到这一点。如果填充了黑色/灰色，则表示它仍在运行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|bfk63|我只想补充说，我在JupyterHub中遇到了一个问题，单元中的代码无法执行。我停止并重新启动了内核，关闭并重新加载了笔记本，但它仍然不能运行。|4uc6v|对我来说起作用的是复制、粘贴相同的代码到一个新的单元格，然后删除旧的单元格。然后它从新的细胞中运行。^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|G|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|H|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|I|9|@]|A|@]|B|$]]]]

The answers that state that your kernel is still executing the code in the cell are correct. You can see that by the small circle in the top right. If it is filled with a black/grey color, then it means it is still running.

I just want to add that I experienced a problem in JupyterHub where the code in the cell would just not execute. I stopped and restarted the kernel, shutdown and reloaded the notebook, but it still did not run.

What worked for me was literally copy pasting the same code to a new cell and deleting the old one. It then ran from the new cell.

entityMap|blocks|key|dcnpn|text|检查服务器环境的输出|type|unstyled|depth|inlineStyleRanges|entityRanges|data|c7drg|如果你能做到的话。您可能会发现错误消息和|1ru5o|结果。^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|G|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|H|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|I|9|@]|A|@]|B|$]]]]

Check the output on the server environment from which <code>jupyter notebook</code> was launched if you can. You'll probably find error messages and <code>print()</code> results.

entityMap|blocks|key|9p3t4|text|我修复了这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5ivgd|只需键入以下命令：|e6oe6|它将显示路径，然后在Jupyter+Notebook浏览器上复制和粘贴|b3mhq|代码将在IPython+Notebook+Python3中执行^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|J|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|K|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|L|9|@]|A|@]|B|$]]]]

I fixed this issue 

just only type this command: <code>jupyter notebook --no-browser</code>

It will show you the path then copy and paste on Jupyter Notebook browser 

The code will be executed in IPython Notebook Python 3

entityMap|blocks|key|dvdfc|text|升级|type|unstyled|depth|inlineStyleRanges|entityRanges|data|7r75r|1v0at|然后降级|38eih|到4.2.0为我解决了这个问题。|10hk8|我当前的包版本与|8vuh2|jupyter|6d9er|jupyter==1.0.0
jupyter-client==5.2.2
jupyter-console==6.1.0
jupyter-core==4.4.0
jupyterlab==2.2.5
jupyterlab-server==1.2.0
ipykernel==5.3.4
notebook==5.2.2
tornado==4.2
pyparsing==2.4.2
ipython==5.5.0
ipython-genutils==0.2.0
prompt-toolkit==1.0.15|code-block|syntax|javascript|5pj13|Github^0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|S|9|@]|A|@]|B|$]]|$2|C|4|-4|6|7|8|T|9|@]|A|@]|B|$]]|$2|D|4|E|6|7|8|U|9|@]|A|@]|B|$]]|$2|F|4|G|6|7|8|V|9|@]|A|@]|B|$]]|$2|H|4|I|6|7|8|W|9|@]|A|@]|B|$]]|$2|J|4|K|6|7|8|X|9|@]|A|@]|B|$]]|$2|L|4|M|6|N|8|Y|9|@]|A|@]|B|$O|P]]|$2|Q|4|R|6|7|8|Z|9|@]|A|@]|B|$]]]]

Upgrading <code>ipykernel</code>, <code>notebook</code> and then downgrading <code>tornado</code> to 4.2.0 solved the issue for me.
My current package versions related to jupyter:
<pre><code>jupyter==1.0.0
jupyter-client==5.2.2
jupyter-console==6.1.0
jupyter-core==4.4.0
jupyterlab==2.2.5
jupyterlab-server==1.2.0
ipykernel==5.3.4
notebook==5.2.2
tornado==4.2
pyparsing==2.4.2
ipython==5.5.0
ipython-genutils==0.2.0
prompt-toolkit==1.0.15
</code></pre>
<a href="https://github.com/jupyter/notebook/issues/4439" rel="nofollow noreferrer">Github</a>

entityMap|blocks|key|8df1r|text|发生这种情况的原因是，在第二次运行时，您仍然在与相同的内核实例对话，第一次运行的变量仍然存在，并且没有被清除。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|e3n30|这可以通过在每次运行之前添加以下命令来解决|6vr1h|%25reset+-f|code-block|syntax|javascript^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|J|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|K|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|L|9|@]|A|@]|B|$H|I]]]]

The reason why it is happening is you are still talking to the same kernel instance in the second run, the variables from first run still exist and haven't been cleared.
This can be solved by adding this command before each run
<pre><code>%reset -f
</code></pre>

My code was running fine before I did not change anything and I ran it again. Now it doesn't return anything not even an error. It is just stuck on "In [*]".

<img src="https://i.stack.imgur.com/wtAMV.jpg" alt="See problem visually here">

Jupyter notebook not running code. Stuck on In [*]

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。

页面排版不美观，阅读体验差。

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 在我没有改变任何东西之前，我的代码运行得很好，然后我又运行了一次。现在它不会返回任何东西，甚至不会返回错误。它只是卡在了"In“上。 * “。 ​  ?  ​

问Jupyter notebook没有运行代码。卡住了[*]
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问Jupyter notebook没有运行代码。卡住了[*]EN