obvious correction:

(auto-insert-mode)  ;;; Adds hook to find-files-hook
    (setq auto-insert-directory "~/.mytemplates/") ;;; Or use custom,
*NOTE* Trailing slash important
    (setq auto-insert-query nil) ;;; If you don't want to be prompted
before insertion
    (define-auto-insert "\.py" "my-python-template.py")
    (define-auto-insert "\.php" "my-php-template.php")


the "#+BEGIN_QUOTE " did not belong to the code that I wanted to quote.

2018-06-08 9:32 GMT+02:00 Joseph Vidal-Rosset <joseph.vidal.rosset@gmail.com
>:

> Hello,
>
> A solution to my problem was indeed given in this web page
> https://www.emacswiki.org/emacs/AutoInsertMode:
>
> #+BEGIN_QUOTE
> (auto-insert-mode)  ;;; Adds hook to find-files-hook
>     (setq auto-insert-directory "~/.mytemplates/") ;;; Or use custom, *NOTE* Trailing slash important
>     (setq auto-insert-query nil) ;;; If you don't want to be prompted before insertion
>     (define-auto-insert "\.py" "my-python-template.py")
>     (define-auto-insert "\.php" "my-php-template.php")
>
> It should not be too difficult, even for me, to adapt this code that I
> just tested.
>
> Best wishes,
> –
> Jo.
>