How to get as an ouput an ipynb document with answers without code (not just with echo: false)

[finkelshtein]

Description

Hi,
I would like to have as an output a ipynb file to let students work with it, and I also want to let them compare the answer they obtain with the correct one. However, I want to hide the code from them.
It obviously works for HTML output

---
title: "Test"
format: 
  html:
    keep-ipynb: true
jupyter: python3
---

Calculate the product of 2 and 2.

```{python}
# Write your code here
```

Check the answer:
```{python}
#| echo: false
2 * 2
```

However, the kept ipynb (naturally) contains the code of the last cell. What I want is to get in the results ipynb, instead of the last cell, a markdown cell with just 4 there.
Does there exist a way to do this?

[mcanouil]

Use conditional content, project profile, and directly target the Jupyter Notebook format if you don't want HTML format: ipynb.

• https://quarto.org/docs/authoring/conditional.html
• https://quarto.org/docs/projects/profiles.html

[finkelshtein]

Thank you for pointing out to the format ipynb!
However, I do not want to hide all content, I want to get the output as a Markdown cell.

---
title: "Test"
format: ipynb
jupyter: python3
---

Calculate 2+2
```{python}
#| echo: false
2+2
```

indeed produces such ipynb-document

However, that 4 is "fragile": if a student runs the empty cell, 4 disappears. I would like to have instead of the empty cell a markdown cell with 4.

Kind regards,
Dmitri

[mcanouil]

Then output markdown in a cell with the 4.

[finkelshtein]

Unless I misunderstood you - I would like to have this automatically, not manually.

Imagine a document which contains some Python code visible for students and also many exercises with numerical answers.
For each exercise, I provide a solution which includes a cell with Python code, the last line of the code produces the answer.
If I put #| echo: false in these cells and choose HTML output, students will see the answers and will be able to compare them with their own ones. However, if I want to provide Jupyter Notebook output (e.g. to let students "play" with the visible code), I would need to create manually markdown cells, copy answers from the output, put them into the markdown cells - it's quite boring. (Or did as shown above, but then, as I said, the empty cells will be fragile, they disappear after any rerun)

[mcanouil]

I am not sure to understand what you want but I believe you have to write your code cell to do it all, i.e., produce other code cells.

[finkelshtein]

Can you advise a reference on how to do this (in Quarto)? Or probably on how to get the output of a cell, e.g. assign it to a variable?