Codefolding
This extension adds codefolding functionality from CodeMirror to a codecell. This functionality is still evolving and will improve in the next versions of CodeMirror.
After clicking on the gutter (left margin of codecell) or typing Alt+F, the code gets folded. See the examples below. The folding status is saved in the cell metadata of the notebook, so reloading of a notebook will restore the folding view.
Three different folding modes are supported.
Python-style code folding, detetects indented code.
The unfolded code above can be folded like this:
or this:
For other languages like Javascript using brackets to designate code blocks. This works e.g. for Javascript in using the %%javsscript magic in a codecell.
Allows collapsing of Python code cells to a single comment line. This is useful for long codecells. The algorithm simply looks for a comment in the first line and allows folding in the rest of the cell.
The code above can be folded like this:
Copy the codefolding directory to you /static/custom directory of your IPython profile and add
require(['/static/custom/codefolding/codefolding.js'])to your custom.js file.
If the codefolding does not always work correctly, try updating the codemirror component of IPython with the current Github master one. Codefolding is still in active development.