I found that error using duniterpy-1.1.0 pip3 install duniterpy
./tools/key_create_dunikey.py coucou coucouTraceback (most recent call last): File "/home/pi/.zen/Astroport.ONE/./tools/key_create_dunikey.py", line 18, in <module> from duniterpy.key import SigningKey File "/usr/local/lib/python3.9/dist-packages/duniterpy/__init__.py", line 22, in <module> from . import api, documents, key File "/usr/local/lib/python3.9/dist-packages/duniterpy/key/__init__.py", line 21, in <module> from .ascii_armor import AsciiArmor File "/usr/local/lib/python3.9/dist-packages/duniterpy/key/ascii_armor.py", line 20, in <module> from libnacl.version import version as libnacl_versionModuleNotFoundError: No module named 'libnacl.version'