diff --git a/Selection-code.md b/Selection-code.md
index 2faafb0..503ed10 100644
--- a/Selection-code.md
+++ b/Selection-code.md
@@ -16,6 +16,15 @@ In order to make pretty plots, dedicated code in [[Design.cpp|Design.cpp]] is al
 gROOT->ProcessLine(".L path/to/your/folder/Design.cpp+");
 }
 ```
+
+## Setting up python3 and pyROOT
+**TODO**
+```
+source  /cvmfs/sft.cern.ch/lcg/views/setupViews.sh LCG_97python3 x86_64-centos7-gcc9-opt
+```
+
+
+
 # Running the code
 The code consists of several C++ scripts that are compiled and executed in ROOT. Before every step, it is worth closing and opening ROOT, as it is possible ROOT will complain about redefinition of functions.