Hey @Amine Tadjer
Welcome :) if you have an existing PySpark dataframe, you can convert it to Daft today by writing the data out and then reading it into Daft. You can do that by writing it out as Parquet, or converting it into in-memory data first such as Arrow/Pandas.
@Andrew Gazelka is also working on a way for Daft to work with the PySpark API. This means that Daft should work with the PySpark API soon.