add section in README.md explaining how to download this repo via pip

README.md

@@ -41,3 +41,15 @@ team uses to update the repository.
 
 There is *NO* guarantee that this convenience archive will be updated
 or even provided in the future.
+
+## Notes for Orekit Python users
+
+You can download this orekit data repository via pip (don't forget to activate your conda environment containing orekit beforehand):
+
+```bash
+pip install git+https://gitlab.orekit.org/orekit/orekit-data.git
+```
+
+This will install a Python library named `orekitdata`. The Python library receives a new version tag at every commit in this repository so that your Python project can pull the newest version of the orekit data every time this repository is updated. The 7 last characters of the version tag correspond to the 7 first characters of the git hash of the commit: for instance the Python version `orekitdata-0+untagged.70.g91b2c79` correspond to the commit of the `master` branch of this repository with a githash starting with `91b2c79`.
+
+Then to pass the data folder to Orekit in Python, follow the instructions in the [Python wrapper Wiki](https://gitlab.orekit.org/orekit-labs/python-wrapper/-/wikis/installation#physical-data).