Recall last result

[Fernando Perez]

Erich Neuwirth wrote:

> Is there a standard way of recalling the last result?
> Following situation:
> I call a function producing a large solution
> for a combinatorial problem. The computation takes quite some time.
> I forgot to assign the result to a variable.
> The list is displayed on screen?
> Now i want to count the number of elements in
> the solution list.
> Can i access the result of the last computation in a goboal vaiable?
> 
> History recall does not help me, since that would reproduce my input,
> but I need the output.
> 
> I tried to find the answer in the docs, but could not find it.
> Is there a FAQ dealing with questions like this one?

Try ipython (http://ipython.scipy.org).  It's an interactive shell which
remembers all output in variables named _NNN, where NNN is a numeric identifier
which increases with each new prompt.  

You are likely to be familiar with mathematica, so you should feel right at
home: ipython's prompt system is inspired by mathematica's use of %, %%, %NNN
for recalling previous results.

Best,

f.

ps.  ipython has many other features intended to make interactive use much more
efficient than with the default interpreter.