Today I tried to install the latest pymavlink package:

https://pypi.org/project/pymavlink/

pip install pymavlink
Collecting pymavlink
  Using cached pymavlink-2.4.41-py3-none-any.whl.metadata (6.2 kB)
Requirement already satisfied: future in /home/shared/conda/envs/swarm/lib/python3.10/site-packages (from pymavlink) (1.0.0)
Requirement already satisfied: lxml in /home/shared/conda/envs/swarm/lib/python3.10/site-packages (from pymavlink) (5.3.0)
Using cached pymavlink-2.4.41-py3-none-any.whl (11.6 MB)
Installing collected packages: pymavlink
Successfully installed pymavlink-2.4.41

after installation I found that the source directory is surprisingly small, it only contains the following files:

/dialects /generator /message_definitions /__pycache__ /CSVReader.py /DFReader.py /fgFDM.py /__init__.py /mavexpression.py /mavextra.py /mavparm.py /mavtestgen.py /mavutil.py /mavwp.py /quaternion.py /rotmat.py /setup.py

But when I download it directly from PyPI, it contains the following files:

/dialects /generator /message_definitions /pymavlink.egg-info /tests /tools /COPYING /CSVReader.py /DFReader.py /fgFDM.py /__init__.py /mavexpression.py /mavextra.py /mavparm.py /mavtestgen.py /mavutil.py /mavwp.py /PKG-INFO /pyproject.toml /quaternion.py /README.md /rotmat.py /setup.cfg /setup.py

the pip version has several directory missing. How could this happen? How to prevent it?

UPDATE 1: fearing that it may be caused by defective publishing, it has also been posted on pymavlink issue tracker:

https://github.com/ArduPilot/pymavlink/issues/969