🔒 My GUI freezes every time I run a function

[exotic saddle]

@abstract cliff

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[abstract cliff]

Hey, so the problem is that my function has to use internet to load some info, and while it is loading the GUI freezes

ask if you need me to explain what a part of the code does

[prime sphinx]

!paste -- Send the code here.

[exotic saddle]

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[abstract cliff]

yeah, I tried that, says my code exeeds 512kb

https://drive.google.com/file/d/1hySKfLpenWUtcSE8YBTwngN2hlV3GQoG/view?usp=sharing

even tho it is 168kb

[prime sphinx]

Ah, PyQt, I see.

[abstract cliff]

yep

[prime sphinx]

My first suggestion would be to not use uic since the code it generates is frankly... quite bad. Instead, use QtUic to load your UI directly (I think that's how it's called in PyQt?).

[desert wedge]

This is generally why I avoid qt designer

[abstract cliff]

But I cant do that now, I changed wayyy too much of the code

[prime sphinx]

Anyways, the actual issue here is that you're running the code on the same thread as your GUI. So, if something blocks that UI (like with what would happen with a request), the UI will appear "frozen" because no events are being sent to it and the OS will interpret that as the window "not responding."

Basically, use threads. In PyQt/PySide, there's QThread for this plus a nice interface around it called QRunnable.

https://www.pythonguis.com/tutorials/multithreading-pyqt-applications-qthreadpool/
Here's a nice tutorial about it.

[abstract cliff]

alright, I'll try
should I let you know if I have any problems?

[prime sphinx]

Even if you want to use uic, this is not the correct way of doing it.
You aren't supposed to modify its outputs as implied by the comment:

# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.

You are supposed to have a separate file for the UI you generated and a separate file that loads it into your actual application.

from PyQt5.QtWidgets import QMainWindow
from .uic_file import Ui_MainWindow # or whatever it's called

class Window(QMainWindow, Ui_MainWindow):
  def __init__(self) -> None:
    super().__init__() # add the actual logic for the UI

There's also loading the UI directly through uic although that loses the autocomplete benefits.

Qt Designer is useful only if you know how to use it properly and if the thing you're looking for is a quick UI and you only care about app logic. If you're looking into learning the inner workings of Qt, I would stay away from it (and once you learn enough Qt, you might even find that easier than Designer).

[exotic saddle]

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