[PyQt] Managing variables accross a multiple module GUI

[Oolongtea]

Hi, sorry for replying this late I had to put the project on hold for the past few months because of work priorities.
Thank you all for your insight. I've been trying to organise my code like @Alfalfa explained; most control variables are contained within the scope of a class, unfortunately I am unclear where and how my data should be "stored" within the software's code for easy access & modification. This is especially true in the case of measurement data which will be acquired/changed/displayed by various classes in various modules in my project.
On the other hand the structure of the original code is still a real mess, which doesn't help to have a clear picture of what is going on

@Denni, @Skaperen, if you are still following the thread I'll try to make a dummy version of my program's structure as soon as i have time.