diff --git a/Example01_Highest_income/example01_json.py b/01_Highest_income/example01_json.py
similarity index 100%
rename from Example01_Highest_income/example01_json.py
rename to 01_Highest_income/example01_json.py
diff --git a/Example02_Wind_turbines/example02_csv.py b/02_Wind_turbines/example02_csv.py
similarity index 100%
rename from Example02_Wind_turbines/example02_csv.py
rename to 02_Wind_turbines/example02_csv.py
diff --git a/Example03_Monuments_slideshow/example03_slideshow.py b/03_Monuments_slideshow/example03_slideshow.py
similarity index 100%
rename from Example03_Monuments_slideshow/example03_slideshow.py
rename to 03_Monuments_slideshow/example03_slideshow.py