Re: Evaluate current line in Python mode?

[Andreas Röhler]

Am 29.08.2010 10:37, schrieb Thierry Volpiatto:
> Andreas Röhler<andreas.roehler@easy-emacs.de>  writes:
>
> > Am 28.08.2010 21:45, schrieb Michael Hannon:
> > > Greetings.  I use Emacs for, among other things, running Python code and R
> > > code.  In both modes (Python and ESS "Emacs Speaks Statistics") there is a
> > > function bound to the sequence:
> > >
> > >       C-c C-n
> > >
> > > Both functions advance to the next line of code in the buffer, i.e., skipping
> > > blank lines, comment lines, etc.
> > >
> > > In ESS mode the function bound to C-c C-n also (by default) sends the current
> > > line to R for evaluation.  I find this to be very convenient as a way to watch
> > > calculations "evolve".
> > >
> > > It's possible to do something similar in Python mode by selecting the
> > > current line and then sending the region (C-c C-r) to Python for evaluation,
> > > but this is a bit cumbersome.
> > >
> > > Can anybody suggest a way to graft the ESS-mode behavior onto Python mode?
> >
> > Try this:
> >
> > (defun my-python-send-region (&optional beg end)
> >    (interactive)
> >    (let ((beg (cond (beg beg)
> >                     ((region-active-p)
> >                      (region-beginning))
> >                     (t (line-beginning-position))))
> >          (end (cond (end end)
> >                     ((region-active-p)
> >                      (copy-marker (region-end)))
> >                     (t (line-end-position)))))
> >      (python-send-region beg end)))
> >
> > HTH
> > Comments welcome
>
> Isn't it simpler:
>
> (defun my-python-send-region (beg end)
>    (interactive "r")
>    (if (eq beg end)
>        (python-send-region (point-at-bol) (point-at-eol))
>        (python-send-region beg end)))

"r" complains if no mark is set
Did choose the default getting rid of that constraint

> Otherwise, with cond you can write
>
> (cond (beg)
>        (end))
>
> instead of
>
> (cond (beg beg)
>        (end end))
>
> >

Indeed, will change this.

Thanks




> > Andreas
> >
> > --
> > https://code.launchpad.net/~a-roehler/python-mode
> > https://code.launchpad.net/s-x-emacs-werkstatt/
> >
> > > I've appended the high-level descriptions of both functions.  I understand
> > > that the source code is available, and that I'm free to hack away to my
> > > heart's content.  I just don't have the skills at Emacs/Lisp required to do
> > > such a thing in a finite amount of time.
> > >
> > > Thanks and best wishes,
> > >
> > > -- Mike
> > >
> > >
> > >       Python mode
> > >       ===========
> > >
> > > C-c C-n runs the command python-next-statement, which is an
> > > interactive compiled Lisp function.
> > >
> > > It is bound to C-c C-n.
> > >
> > > (python-next-statement&optional COUNT)
> > >
> > > Go to start of next statement.
> > > With argument COUNT, do it COUNT times.  Stop at end of buffer.
> > > Return count of statements left to move.
> > >
> > > ----------
> > >
> > >       ESS mode
> > >       ========
> > >
> > > C-c C-n runs the command ess-eval-line-and-step, which is an
> > > interactive compiled Lisp function in `ess-inf.el'.
> > >
> > > It is bound to C-c C-n, C-c C-e C-n,<menu-bar>   <ESS>   <ESS Eval>   <Eval
> > > line&   step>.
> > >
> > > (ess-eval-line-and-step&optional SIMPLE-NEXT EVEN-EMPTY INVISIBLY)
> > >
> > > Evaluate the current line visibly and step to the "next" line.
> > > "next" = the next line with non-comment code _unless_ SIMPLE-NEXT is non-nil,
> > > possibly via prefix arg.  If 2nd arg EVEN-EMPTY [prefix as well],
> > > also send empty lines.    When the variable `ess-eval-empty' is non-nil
> > > both SIMPLE-NEXT and EVEN-EMPTY are interpreted as true.