Ugly! snake_case and camelCase are mixed in the code

[A-Infor]

I changed the source code significantly, emplying always the Python variable name convention of SNAKE CASE.
But the original source code employed CAMEL CASE, and I have not always changed it to the right format.

Now, part of the source code employs SNAKE CASE, part employs CAMEL CASE.
This needs to be addressed.