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I'm trying to build an app with extensive use of QDockwidgets. However, I've found that I cannot use QDockwidgets made in Qt Designer.

Here's my customized dockwidget.ui as displayed in Designer:

Here's the QMainWindow form main2.ui with promoted widget (called DockWidget with instance name dw)

Here's what the finished app looks like. The dockwidget is completely empty. Are there any tricks to getting a QDockWidget form (ui file) from Designer to display properly in PyQt5?

main2.py

I've been trying to embed a graph into my application using pyqtgraph's PlotWidget. It seemed simple enough while following this tutorial. I have managed to show a graph well enough, the problem is that the graph looks broken. Here is an image of the most simple app I could make to show the problem:

Bugged graph app

I used the following code:

I am writing a WebCam Gui, which is supposed to take pictures and manipulate with WebCam parameters. After the video stream is activated on the main GUI window, an additional window can be opened to change the WebCamera parameters Screenshot 1, Screenshot 2.

I am using Qthread to stream on QLabel. Also, I was able to set the initial camera parameters on the camera properties' changing window. My problem is changing the Exposure parameter by using a slider on the sub-window and seeing results in real-time on the main window.

Please see the code.

As I cannot write whole code here, I simplified it with the same problem.

The simplified program is python code connected with a ui file, which is:

I am trying to search an typed item from QTlistwidget, and when selected it will then search again to see if exist from the ziped list.

However, the first time running it will able to find the match. The second time i select, the zip_cmsdata will return me an empty list For example: 1st time search "Hello", and then selected "Hello" from the Qtlistwdiget output:

Here is my query:

I made GUI with PyQT5, and some pushbuttons are connected to codes using Selenium.

The buttons work well, but problem is that Selenium keeps opening new window when I click the button.

If I define variable "driver = webdriver.Edge(~~)" outside of class, Selenium works fine in one window. However, I want to open the browser when I click the buttons, not at the start of the code.

1. btn_1_clicked and btn_2_clicked work in one window, but the problem is that the browser opens as soon as I run the code.

I have a basic image viewer (mostly just trying to learn the quirks of QGraphicsView rather than labels) that I'm trying to allow some basic zoom and pan functionality. It loads a directory of images the user can click through, but fails to load the image. It will return the dimensions, but receives a float division by zero arrow when trying to set the scene. I have tried setting as a QImage, but it doesn't seem to make a difference.

actions_test.py

In one window, I have a button that, when clicked, I want to execute a method from another module. This method takes an indeterminate amount of time to execute and depends on user input in the terminal. This method creates a file and repeatedly opens it, writes things to the file, and closes the file. At the same time this is running I have a matplotlib graph widget in the window with a plot that I want to update each time something new is written to the file by reading and plotting data from the most recent line of the file.

To check for changes to the file, I'm using QFileSystemWatcher. Right now, nothing happens while the userInputFunction() is running, but when it finishes I get "data/runName_Rec.txt dataFileCreated". If I then manually edit the file in any way the plotting happens as it should. So it seems the watcher only starts working again and sees that there has been a change in the directory after the userInputFunction() finishes.

How do I do the multithreading correctly so that the watcher works while userInputFunction() is running?

As I understand it, nothing in my application will respond until the user input function finishes if I have it running in the main thread of my QT program. To address this I tried moving the execution of the user input method into a worker thread following the example here: https://realpython.com/python-pyqt-qthread/. In this worker I have two methods. One simply does a for loop with a sleep() that takes a while exactly like the example. The other runs my userInputFunction(). The for loop method, run(), does not freeze the GUI. However, runScan() which exicutes the actual process I want does still freeze the GUI. I'm not sure what is going on here. I'm not sure if this means I'm not doing the threading properly or if something else is going on.

Here is a simplified sample of the relevant parts of my code.