diff --git a/sessions/python-11.md b/sessions/python-11.md
index b885162..a82ed28 100644
--- a/sessions/python-11.md
+++ b/sessions/python-11.md
@@ -3,7 +3,7 @@
 
 \center \huge Retour sur les exceptions
 
-# A quoi sert finally
+# A quoi sert finally?
 
 ```python
 try:
@@ -16,29 +16,51 @@ finally:
     fp.close()
 ```
 
-Que se passe-t-il si on remplace `1/0` par
-`my_list[42]` ?
+versus:
 
-\center \huge Libraries tierces
+```python
+try:
+    fp = open("file.txt")
+    1 / 0
+except ZeroDivisionError:
+    print("got you")
 
-# Introduction: pip
+fp.close()
+```
 
-* python3 -m pip
-* `--user`
+# Réponse:
 
-But: what about several projects?
+Que se passe-t-il si l'exception *n'est pas* ZeroDivisionError?
 
-# Virtualenvs
 
-# pip + virtualenv = <3
+\center \huge Utiliser des bibliothèques tierces
 
-# Tuto
+Plan:
 
-* Let's install requests!
+- sys.path
+- difference debian/arch
+- in $HOME
+- PYTHONPATH
 
-```
-# avant
+- so how do we put the code from pypi.org inside sys.path?
+- setup.py
 
-# après
-```
+- pip
+
+- example with tabulate
+- TODO: example with more deps
+
+- problemes:
+
+- un seul .local/bin sur linux :/
+- 2 projets avec des versions de deps differentes
+
+# The rules
+
+* One virtualenv per project
+* One virtualenv per Python version
+* Only use pip from *inside* a virtualenv
+
+Tuto:
 
+* let's install tabulate and requests