[Solved] Jupyter Notebook not running code Stuck on In [*]

# [Solved] Jupyter Notebook not running code Stuck on In [*]

The issue where Jupyter Notebook doesn't run your code and is stuck on "In [*]" means that Jupyter is still running your code within the kernel.

To resolve the issue, make sure:

• You don't have an infinite loop in your code or a function that recursively invokes itself.

• You aren't trying to connect to a database that is currently offline.

# Make sure the problem is not within your code

Make sure that the problem is not within your code.

The issue most often occurs:

• if you have an infinite loop
• if you have a function that recursively invokes itself infinitely
• if you are trying to connect to a database that is offline, so the attempt times out
• if you are making an HTTP request to a server that doesn't respond without timeout set up

If the issue is within your code, you have to resolve it as interrupting the kernel and rerunning your code wouldn't help.

# Interrupt and restart the Kernel

The first thing you should try is to click on the square "Interrupt the kernel button".

Here is a short clip that demonstrates how this works.

If the issue persists:

1. Click on the Kernel button in the top menu.
2. Click on Interrupt.
3. Click on the Kernel button again.
4. Select Restart.

5. When you get prompted, whether you want to restart the Kernel, click on Restart.

Here is a short clip that shows how this works.

Another thing you can try is to:

1. Click on Kernel in the top menu.
2. Click on Restart & Run all.

You can also try to:

1. Click on Kernel in the top menu.
2. Click on Shutdown.
3. Click on Kernel again.
4. Select Restart.

If that didn't help either, stop your jupyter-notebook server and restart it.

1. Save any changes you've made.
2. Focus your terminal window, press Ctrl + C (or Cmd + C on macOS), type y and hit Enter.

3. Type jupyter-notebook to start your server again.

# Upgrade IPykernel if the issue persists

If the issue persists, try to upgrade the ipykernel package.

Run the following command from your terminal.

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pip install --upgrade ipykernel

# Or with pip3
pip3 install --upgrade ipykernel

You can try to restart the Kernel if the issue persists.

If you use Anaconda, try issuing the following command.

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conda update ipykernel

# Or
conda install ipykernel

You can also try to update the Anaconda meta package if you use Anaconda.

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conda update conda
conda update anaconda

If the issue persists:

1. Click on the Kernel button in the top menu.
2. Click on Interrupt.
3. Click on the Kernel button again.
4. Select Restart.

# Additional Resources

You can learn more about the related topics by checking out the following tutorials:

• How to restart the Kernel in Jupyter Notebook
• How to check your Python version in Jupyter Notebook
• Error executing Jupyter command 'notebook': [Errno 2] No such file or directory
• Reload a module and its submodules in Jupyter Notebook
• IProgress not found. Please update jupyter and ipywidgets
• Jupyter Notebook 500: Internal Server Error [Solved]
• IOPub data rate exceeded in Jupyter Notebook [Solved]
• Jupyter Notebook "Not Trusted" issue [Solved]
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• How to Collapse cells in Jupyter Notebook & Jupyter Lab