prepare-ipynb is a small tool that allows you to automate modifications to Jupyter notebooks that make them suitable for in-class demonstrations.

In particular, you can:

• clear-marked-inputs: "Clears" input cells. Generally, this will delete/ replace parts of the cell contents, so that, as an exercise for the recipient of the notebook, these parts can be developed from scratch. See the section on cell annotations below for what precisely this means.

• clear-and-collase-marked-inputs: Apply the same cell modifications as clear-marked-inputs, but also preserve a collapsed version of the original cell (with marks removed, see remove-marks) below. This cell can be expanded to reveal the solution.

• clear-output: Remove all output cells from the notebook, so that the results of the computation are more of a 'surprise' in class.

• remove-marks: Removes #clear marks to produce material suitable for distribution to students.

Note: Despite the name, the current version also supports Jupyter (v4) notebooks.

Each cell annotation should appear or a line by itself.

• #clear (anywhere in the cell) deletes the entire contents of the cell.
• #beginclear / #endclear will remove all lines between the two marks, replacing #beginclear with an ellipsis (...).