liatemplates / pyodide Goto Github PK

Hello! Thank you so much for your work on this template. It's fantastic! We're building several LiaScript courses using Pyodide now, and we've run into an issue that may be of interest to others as well.

For some executable code blocks, we'd like to provide additional pedagogical text when learners encounter errors --- in other words, we'd like a way to add a custom message below a code block if a user runs the code and receives an error, ideally in addition to the error handling already happening in the Pyodide.eval_ macro.

For example, we have courses where learners load the example data on one slide of the course and then use it throughout the following slides. If someone enters the course at a later slide (maybe if a friend sends them a link to that particular slide), or if they refresh the browser part way through a course, the data loaded on an earlier slide will no longer be available. Then when they try to execute a code block, it won't work (they'll get something like "NameError: name 'data' is not defined", which is suggestive but we could be much more helpful). So when we include executable code blocks that we know rely on code having been run previously in the course, it would be fantastic to be able to show a helpful message to that effect if they code returns an error.

It would be ideal to have the helpful message be regular liascript, rather than showing up in the console log for the code block (so we could include a hyperlink back to the slide with the code they need to run, for example).
I tried modifying the Pyodide.eval_ macro to return an output that would be a boolean indicating if the code ran successfully or not, but I wasn't able to get it to work. I was hoping to add a new smaller macro to that would that that as input and print a help message if true or just print nothing if false.