[IPython-dev] Re: Leo, IPython and the summer of code

Robert Kern rkern at ucsd.edu
Tue Jul 5 15:36:04 EDT 2005

Edward K. Ream wrote:

> More importantly, Leo, right now, implements everything envisioned in 
> the project description:
> - Leo works well with IPython. See below for details.

It does not interact with IPython in the way we need. The proposal is a 
bit unclear as to the precise goal of this project. It gives undue 
emphasis on the file format which gives readers the impression that it 
is proposing a new literate programming tool. If that were the case, 
then Leo would satisfy the proposal just fine.

However, we are not looking for a literate programming tool. We are 
looking for a GUI Read-Eval-Print Loop that is embedded in a rich text 
document. The way that Leo interacts with IPython is to run the REPL in 
a console divorced from the document. This is not what we want. To see a 
static example of what we want, please look at this rendered example 
from my current codebase:


That is essentially the format that we want to be editing within the 
GUI. There are two important points here:

   1. We want the shell as part of the GUI.
   2. We don't want the user to have to do any markup unless he is doing 
something special.

I do not believe that using Leo as a base for this project is justified 
at this time. Further development to interface with Leo is an option and 
something to explore later. At this time, I feel that focusing on our 
core requirements and developing outside of a framework (Leo, or any 
others like Envisage, Eclipse, Blackadder, and the like) will serve us 
best in the end.

Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter

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