From b6da1e24a1881eefe25a73269732df078c340f8a Mon Sep 17 00:00:00 2001
From: Benjamin Bertrand <lafrite@poneyworld.net>
Date: Wed, 2 Mar 2016 17:13:21 +0300
Subject: [PATCH] dd docstring for explain for Explicable

---
 pymath/calculus/explicable.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/pymath/calculus/explicable.py b/pymath/calculus/explicable.py
index 11bffb5..dd9adcc 100644
--- a/pymath/calculus/explicable.py
+++ b/pymath/calculus/explicable.py
@@ -20,10 +20,20 @@ class Explicable(Renderable):
         self.steps = []
 
     def explain(self, noself=True):
-        """ Generate and render steps  which leed to itself
+        r""" Generate and render steps  which leed to itself
 
         :param noself: does explain return self
 
+        >>> action = Explicable()
+        >>> from .expression import Expression
+        >>> action.postfix_tokens = Expression('42')
+        >>> action.this_append_before([Expression('2+10*4'), Expression('2+40')])
+        >>> for i in action.explain():
+        ...    print(i)
+        2 + 10 \times 4
+        2 + 40
+        42
+        
         """
         old_s = ''
         # les étapes pour l'atteindre