On Dec 2, 10:46 am, Harald Schilly <harald.schi...@gmail.com> wrote:
> On Dec 2, 5:01 pm, rjf <fate...@gmail.com> wrote:
>
> > In the Maxima environment, if someone detects an error in a lisp
> > function, FF then the function
> > can be replaced in the run-time environment, e.g. at a command line
> > (%i100) by:
> > :lisp (defun FF(x y z) <newdefinition>)
>
> In the Python environment, if someone detects an error in a Python
> function FF, then the function can be replaced in the run-time
> environment, e.g. at a command line by:
>
> >>> def FF(x):
>
> ... return 2*x
By the way, I discovered accidentally that from the command line (not
the notebook) if you type:
sage: ed # or %ed or %edit
then it opens up your favorite editor (whatever is set by the $EDITOR
shell variable). Then in the editor you can type
def FF(x):
long definition here
which would be really annoying
to type on the command line
then save it -- it gets written to a temporary file -- and the code
gets executed and you have thus redefined FF. Then later you can do
sage: ed FF
and it will let you modify your code. This is an ipython feature, it
seems. Should it be described somewhere in the Sage documentation?
--
John
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