Re: Evaluating python code blocks in python-mode

["Andreas Röhler" <andreas.roehler@easy-emacs.de>]

Am 25.06.2015 um 12:25 schrieb Yuri D'Elia:
> On 06/21/2015 08:52 PM, Andreas Röhler wrote:
>> It might be an option to use existing markers from folding-mode. OTOH
>> don't see a command there how to copy the section. Do you?
> So this is what I came up with and I currently use:
>
> http://www.thregr.org/~wavexx/tmp/python-mode-extra.el
>
> Sorry for not inlining the file, but I think it's more readable.
>
> The idea is that "C-c C-c" sends the current fold you're in. If you're in a nested fold, subfolds are send too. If you're not in a fold, the buffer (or narrowed region) is sent instead.
>
> As an added bonus, I wanted to define a generic block delimiter, which is # --- in my case. `python-shell-send-fold-or-section' will send the current fold if there's any, up to the closest block delimiter (if any).
>
> So for example, in a file like:
>
>   print "1"
>   # ---
>   print "2"
>
> "C-c C-c" on either print statement will be limited to that statement. Block delimiters can be nested inside folds, and work as you'd expect: if you're in the same fold as a delimiter, the delimiter is used. If you're upwards, the delimiter is ignored.
>
> This makes it very easy to delimit "computation blocks", as you'd normally do in an interactive notebook, without the burden to define folds for each.
>
> To top that, the region being sent is added with a volatile highlight (volatile-highlights.el is required) so you see what's being evaluated.
>
> I love it.
>
> It works in Fabián's python-mode, but should work with minimal changes with other modes too.
>
> I actually redefine some bindings for python-mode to behave more like ESS (which IMHO has a better layout for interactive evaluation), resulting in something like:
>
> (add-hook 'python-mode-hook
> 	  (lambda ()
> 	    (local-set-key (kbd "C-c C-j") 'python-shell-send-line)
> 	    (local-set-key (kbd "C-c C-n") 'python-shell-send-line and-step)
> 	    (local-set-key (kbd "C-c C-f") 'python-shell-send-defun)
> 	    (local-set-key (kbd "C-c C-b") 'python-shell-send-buffer)
> 	    (local-set-key (kbd "C-c C-c") 'python-shell-send-fold-or-section)))
>
> `python-shell-send-fold-or-section' is what is defined in python-mode-extra.el, which was a little tricker to define than anticipated, but it seems to work correctly.
>
> I re-use the markers defined in folding-mode, so if you want to customize the markers just use `folding-add-to-marks-list'. folding-mode doesn't need to be enabled. I actually don't use folding, I just wanted to re-use the same methods.
>

Thanks for the inspiration. The feature made it into python-mode.el 
meanwhile

https://bugs.launchpad.net/python-mode/+bug/1467217

Kept it independent from folder-mode, as python-mode.el doesn't require 
any extern stuff for now.

BTW see in your file unknown "vhl/add-range"

Cheers,

Andreas