Python modules not found when using sudo

Problem :

$ sudo python3 -c "import sys; import board; print(board.__file__)"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'board'

Without sudo :

$ python3 -c "import sys; print(sys.path)"
['', 
 '/usr/lib/python39.zip', 
 '/usr/lib/python3.9', 
 '/usr/lib/python3.9/lib-dynload', 
 '/home/francois/.local/lib/python3.9/site-packages', 
 '/usr/local/lib/python3.9/dist-packages', 
 '/usr/lib/python3/dist-packages', 
 '/usr/lib/python3.9/dist-packages']

With sudo, the user's packages are not included :

$ sudo python3 -c "import sys; print(sys.path)"
['', 
 '/usr/lib/python39.zip',
 '/usr/lib/python3.9', 
 '/usr/lib/python3.9/lib-dynload', 
 '/usr/local/lib/python3.9/dist-packages', 
 '/usr/lib/python3/dist-packages', 
 '/usr/lib/python3.9/dist-packages']

Solution :

Use -E option with sudo :

$ sudo -E python3 -c "import sys; import board; print(board.__file__)"
/home/francois/.local/lib/python3.9/site-packages/board.py