From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joao Cortes <joaooneillcortes@outlook.pt>
Subject: Re: Python source block and :dir header arg
Date: Mon, 1 Apr 2019 18:16:53 +0000
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To: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>

Looking at org-babel-execute-src-block, It seems the only way to get the
the intended behavihour is adding :mkdirp "yes" or some other
value that gives a true value to the result of the =3Dand=3D call in the
following snippet.

This is the relevant code at ob-core.el, starting at line 681.
#+begin_src emacs-lisp :line yes
		 (default-directory
		   (or (and dir
			    (not (member mkdirp '("no" "nil" nil)))
			    (progn
			      (let ((d (file-name-as-directory
					(expand-file-name dir))))
				(make-directory d 'parents)
				d)))
		       default-directory))
#+end_src

This looks like a bug. If the :dir directory already
exists, the :mkdirp parameter should not stop setting the default
directory to :dir