Convert from PVD (or VTU) to .txt or .csv
 

Hello, I'm pretty new to Paraview (I've never used it before). I have some data (dobule values, one for each point of a 3D mesh) stored in a .PVD file, and I'd want to know if there is a way to retrieve them by Python without opening Paraview and click on Save Data, like a translation to .txt or .csv. I have also the VTU file.
Thank you!