Extracting motion vectors from movie

[Danaco2021]

I know how to use ffplay or ffmpeg to create the motion vectors visualization:
ffplay -i myvideo.mp4 -flags2 +export_mvs -vf codecview=mv=pf+bf+bb

How can I do the same in ffmpeg-python?
I tried adding .filter(“-flags2”,”+export_mvs”) but this resulted an error.

What is the correct way to add both the flags2 and the codecview?

if I get just get the motion vectors without the image it will even be better.

I am working on a win10 os.
thank you .