Retrieval program for COVR output libraries

[osama19976]

Hi Njoy team,
I have read njoy manual and I have found that there is a retrieval program for covariance file in BOXER in fortran .firstly, I would like to know how to modify njoy input to produce covariance file in BOXER format since I am using an existing input , secondly, am wondering if there is a python version for retrieval program ,because I think I have seen in the discreption that there is one.
Thank you in advance.