Add a GIF to illustrate the REPL workflow

[egr95]

Closes #535

[junghan0611]

This is the workflow I was looking for, thank you.

[junghan0611]

How did you set dotfiles up emacs-jupyter and code-cells?

[egr95]

Glad you like it!

My config uses the awesome doom emacs, which I highly recommend (note that emacs-jupyter is shipped as part of the org module in doom, so you can choose between enabling that and installing manually). Other than that, I like to use (setq jupyter-repl-echo-eval-p t), which conveniently echoes the code you have run in the REPL, and I also define the following function for sending code chunks from my python files to the REPL (which I borrowed from Hank Greenburg):

(defun gm/jupyter-eval-region (beg end)
  "Evaluate the region between BEG and END."
  (interactive "r")
  (let* ((string (buffer-substring beg end))
         (string (replace-regexp-in-string "\\`[\n]*" "" string)) ; Remove leading empty lines
         (indent-length (string-match "[^ \t]" string)) ; Find indent length of the first line
         (unindented-string (replace-regexp-in-string (format "^%s" (make-string indent-length ?\ ))
                                                      "" string t t))) ; Remove exactly that amount of indentation
    (jupyter-eval-string unindented-string)))
(add-to-list 'code-cells-eval-region-commands '(jupyter-repl-interaction-mode . gm/jupyter-eval-region))