Added doc on how to configure emacs for pep8/python syntax check.

doc/dev_start_guide.txt

@@ -317,7 +317,48 @@ bindings to work only on Python files.
 Emacs
 ~~~~~
 
-WRITEME
+There is an **execellent** system to configure emacs for python:
+`emacs-for-python
+<https://github.com/gabrielelanaro/emacs-for-python>`_. It gatter many
+emacs config into one and modify them to behave together nicely. You
+can use it to check for pep8 compliance and for python syntax errors.
+
+To install it on linux, you can do like this:
+
+.. code-block:: bash
+
+   cd
+   git clone https://github.com/gabrielelanaro/emacs-for-python.git .emacs.d/emacs-for-python
+
+
+Then in your ``~/.emacs`` file, add this:
+
+.. code-block:: bash
+
+   ;; Mandatory
+   (load-file "~/.emacs.d/emacs-for-python/epy-init.el")
+   (add-to-list 'load-path "~/.emacs.d/emacs-for-python/") ;; tell where to load the various files
+
+   ;; Each of them enable different part of the system
+   ;; only the 2 first are needed for pep8, syntax check.
+   (require 'epy-setup) ;; It will setup other loads, it is required!
+   (require 'epy-python) ;; If you want the python facilities [optional]
+   (require 'epy-completion) ;; If you want the autocompletion settings [optional]
+   (require 'epy-editing) ;; For configurations related to editing [optional]
+
+   ;; define f10 to previous error
+   ;; define f11 to next error
+   (require 'epy-bindings) ;; For my suggested keybindings [optional]
+
+   ;; some shortcut that don't collide with gnome-terminal
+   ;; otherwise, "epy-bindings" define f10 and f11 for them.
+   (global-set-key [f2] 'flymake-goto-prev-error)
+   (global-set-key [f3] 'flymake-goto-next-error)
+
+   ;; next two lines are the checks to do. You can add more if you wish
+   (epy-setup-checker "pyflakes %f") ;; for python syntax check
+   (epy-setup-checker "pep8 %f") ;; for pep8 check
+
 
 
 Unit tests