progress_bar.sh | Progress bar for the shell

i have an application that receives .pickle file with labeled train data, and should build a neural network (with Keras). It should train on the data, and show the train/validation errors live on a canvas with matplotlib and show the progress with the QprogressBar.

I have a custom callback that sends a pyqtSignal to the main GUI on each epoch end, sending the current epoch and the cumulative train and validation errors. Then in the main program there is a function that receives the signal and triggers the update method.

Everything works fine until I press on the GUI window - then the app stucks (but the net still runs in the shell). I guess the click interrupt triggers some loop that makes the whole program freeze, but i could"nt figure out which.

I"ve searched other questions regarding the PyQt5 GUI being stuck when using threads, but did"t find an answer - here

I"ve tried to use Qthread.start() instead of Qthread.run() for the Qthread - but in this case the plots don"t update at all.

I"ve written a complete example to demonstrate the problem (the data file should be in .pickle format and contain a list [X, y] of X - samples as a numpy ndarray, and y - the corresponding labels as numpy ndarray and can be found at https://www.kaggle.com/luciferadmin/heart-disease-uci-in-pickle-format) :