Homogenisation of the pred and valid functions to create the discrim function

See merge request !6

Merge main to CH_master

See merge request !5

# Conflicts:
#   example_demo/prediction.ipynb
#   example_demo/validation.ipynb

Merge MB_master to main

See merge request !3

# Conflicts:
#   run.py

Ch master

See merge request !2

Homogenization of the function description and compliance to PEP8

See merge request !1

# Conflicts:
#   README.md