Re: :tangle header argument not picked up in #+PROPERTY line or :PROPERTIES: block

["Berry, Charles" via "General discussions about Org-mode." <emacs-orgmode@gnu.org>]

> On Mar 30, 2020, at 3:23 PM, Joost Kremers <joostkremers@fastmail.fm> wrote:
> 

[stuff deleted]

> 
> If I reverse the order and add a `+` sign, like so:
> 
> ```
> :PROPERTIES:
> :header-args:python+: :session py1 :results function
> :header-args:python+: :tangle out1.py
> :END:
> ```
> 
> the code does indeed get tangled, but the `:results` header arg isn't picked up, because the code block doesn't produce any output.


Not so.

`org-babel-view-src-block-info' (C-c C-v C-i with point in the src block below) reports

,----
| Lang: python
| Properties:
| 	:header-args 	nil
| 	:header-args:python 	:session py1 :results function :tangle out1.py
| Header Arguments:
| 	:cache		no
| 	:exports	code
| 	:hlines		no
| 	:noweb		no
| 	:results	function replace
| 	:session	py1
| 	:tangle		out1.py
`----

> 
> For reference, this is my test file:
> 
> ```
> * Header 1
> :PROPERTIES:
> :header-args:python+: :session py1 :results function
> :header-args:python+: :tangle out1.py
> :END:
> 
> #+begin_src python
> a=1
> b=2
> c=a+b
> return c
> #+end_src
> 
> #+RESULTS:
> ```