collapse cell in jupyter notebook

Question

I am using ipython Jupyter notebook. Let's say I defined a function that occupies a lot of space on my screen. Is there a way to collapse the cell? I want the function to remain executed and callable, yet I want to hide / collapse the cell in order to better visualize the notebook. How can I do this?

Accepted Answer

UPDATE:

The newer `jupyter-lab` is a more modern and feature-rich interface which supports cell folding by default. See @intsco's answer below

UPDATE 2

Since `jupyter-lab` now also supports extensions, you can extend the built-in cell-folding functionality with the `Collapsible_Headings` extension.

Original answer:

The `jupyter contrib nbextensions` Python package contains a code-folding extension that can be enabled within the notebook. Follow the link (Github) for documentation.

To install using command line:

```
pip install jupyter_contrib_nbextensions
jupyter contrib nbextension install --user
```

To make life easier in managing them, I'd also recommend the `jupyter nbextensions configurator` package. This provides an extra tab in your Notebook interface from where you can easily (de)activate all installed extensions.

Installation:

```
pip install jupyter_nbextensions_configurator
jupyter nbextensions_configurator enable --user
```

collapse cell in jupyter notebook

Solution

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