Name: [022] André Roberge
Member: 114 months
Authored: 6 videos
Description: I'm a father of two wonderful children, a Theoretical Physicist by training, a University President by accident, and a hobbyist Python programmer. I created rur-ple and Crunchy (the latter with the collaboration of Johannes Woolard). To reach me: ...

Introduction to Crunchy [ID:432] (1/4)

in series: Crunchy

video tutorial by André Roberge, added 11/07

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In this video, I give an introduction to Crunchy. Crunchy is a Python application that transforms a static html document into an interactive Python session within your browser; currently only Firefox is fully supported. This introduction to Crunchy is intended to give a broad overview of Crunchy's capabilities. Future videos will give a more in-depth look at various Crunchy elements.

This video has been recorded using a complementary copy of iShowU, courtesy of Neil Clayton.

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Video statistics:

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  • Video plays: 66 (since July 30th)
  • Plays in last week: 1
  • Published: 105 months ago

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27. fitflop sales Mon, 12 Apr 2010 17:32

Hi Andre, great video on Crunchy ... I am looking at using Python to improve the productivity of a scientific computing group I work with (their code is mostly C), and Crunchy looks to have lots of potential to help people make that transition :)

26. Buy Cigarettes Online Marlboro Red 30 Cartons Marlboro Cigarettes 024 Sat, 16 Jan 2010 16:37

Great video about a great piece of software! I'll definitely give it a try.

25. anonymous Tue, 17 Nov 2009 17:30

Andre -- Great project! I'll be sharing Crunchy with Python users throughout New Zealand.

24. anonymous Wed, 09 Sep 2009 07:14

very good overview and demo

23. anonymous Wed, 29 Jul 2009 03:02

Dear Andre,

thank you for creating and introducing Crunchy to me.

It will help me in my python course development.



22. anonymous Mon, 27 Jul 2009 12:37


21. anonymous Tue, 28 Apr 2009 11:43

Nice! Keep up the good work.

20. anonymous Thu, 23 Apr 2009 15:48

Very impressed. I am writing a book on algorithms (using Python3). I can imagine using Crunchy (or something like it) for an optional dynamic version of examples and exercises.

18. anonymous Sat, 28 Mar 2009 09:39

Good video -- I was interested in a quick overview of what crunchy does before downloading, and it certainly satisfied that requirement.

17. anonymous Wed, 18 Mar 2009 03:12

good introduction....................nice explanation

16. anonymous Sat, 27 Dec 2008 09:32

Thanks for the interesting video. What I am missing are real applications for crunchy. I have to read more about it.

Greetings, Rudi

15. anonymous Tue, 14 Oct 2008 22:36

I've heard a lot about security problems, and that you hope to solve these by using MS SilverLight. I'm using ubuntu Linux. Will SilverLight be compatible with Ubuntu? When is such a version likely to be available? I've looked at the details of SilverLight. But I am no wiser! I've failed to understand what sort of a thing it is.

I think Crunchy is a wonderful product, though I have yet to get it up and running. My interest is mainly math and geometry, so all I want to do is use trig and draw lines most of the time -- with the capability to send examples to a portable form that demonstrates algorithms, etc.

I've also looked at details of ElementTree. This seems to be a good idea (if I have understood it correctly). It looks as if you only want (say) cos() in your program you don't have to import the entire math library. Is that about right?

Well done!

Louis Gidney (b.1939)

Retired to Scottish Highlands

14. anonymous Sat, 22 Mar 2008 14:26

Fantastic. Thanks!

Hi André. Just a quick post to say that I've posted about your 3 screencasts on our blog:

This will send them out to the two Planet Python aggregators.

Your videos are already very popular (, this exposure should bring Crunchy to the attention of a new set of people.



This is really interesting especially showing new method of interactive learning.

wonderful work!

10. anonymous Mon, 31 Dec 2007 11:51

Excellent -- my students will love this! Crunchy effectively replaces me and they will be able to work through examples at their own pace!! Thanks very much for this effort. It is much appreciated.

Wow, awesome. Crunchy looks amazing. I was looking for some such tool for teaching Python and Crunchy seems perfect for it.

André - I just used the new submit-to feature to add a link to this Crunchy video into Programming.Reddit:

Do feel free to vote for it and to experiment with submitting links to other sites.



gasto: No, it is not (at least, not for now) since this is running client size, and that there is no sandboxing. It's ok for short code sample, which you can read entirely before clicking on a button to have it executed.

Good! Is this the future of web games , programmed with python?

Well, what can I say? Your screencast has blown me away. Crunchy is simply...amazing, an incredible powerful and useful tool especially in teaching environments.

I think we should definitely try and spread the word about this fantastic screencast!

Very well done,


André - this is a *fantastic* Python screencast! I had no idea you were going to cover such cool stuff!

From reading your description I had no idea you were going to cover writing live Python code in a browser, drawing in a Firefox Canvas, animation, matplotlib, doctests, the beautiful inline editor and editing Python code via impressive!

I really hope you can crank out some more videos like these!


ps. I'll post a useful critique in the Google Group for you too:

Thanks for the video! I am eagerly waiting for the next ones...

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