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I'd like to bind C-x C-e to python-shell-send-region when I am in python major-mode.

In my config file, I have an add-hook for python mode, but I'd like this keybinding override to be removed/restored when I exit python major-mode.

The use-case for this is that I want to be able to switch my *scratch* buffer between modes and for things to continue making sense.

Is there an idiomatic way to achieve this?

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Not too sure what you're asking. But it sounds like the answer is to bind your key in the major mode's keymap, not in the global-map.

For example, if the keymap for your Python mode is python-mode-map then do this:

(define-key python-mode-map (kbd "C-x C-e") 'python-shell-send-region)
| improve this answer | |
  • Ahh, that's exactly it. In the process of running around for a solution, I wasn't seeing the forest for the trees. (and to explain, I was asking for a hook for when python-mode is exited so that I could restore what was previously bound - quite convoluted and unecessary) Thanks for the quick answer. – MB. Nov 7 '19 at 4:14
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    More information here: gnu.org/software/emacs/manual/html_node/eintr/… – aartist Nov 7 '19 at 12:54

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