the issue is present in PyQt5 since 5.11.0 (tested 5.11.x, 5.12.x and 5.13) and PySide2 v.5.13 on MacOS (tested 10.14 and 10.12.6). The v.5.10.1 works fine. The issue does not exist under Linux and Windows Adding a call to the repaint method fix the issue. def setTextHelloWorld(self): self.label.setText(“Hello World”) self.label.repaint()
This is probably due to changes in the way exceptions are dealt with in PyQt-5.5. To quote from the PyQt5 Docs: In PyQt v5.5 an unhandled Python exception will result in a call to Qt’s qFatal() function. By default this will call abort() and the application will terminate. Note that an application installed exception hook … Read more
The problem is that the function that obtains the image is executed only once and not updating the label. The correct way is to place it inside a loop, but it will result in blocking the main window. This blocking of main window can be solved by using the QThread class and send through a … Read more
As suggested by user3030010 and ekhumoro it expects a callable function. In which case you should replace that argument with lambda: mixCocktail(“string”) AND ALSO don’t use str it’s a python built-in datatype I have replaced it with _str import sys from PyQt5.QtWidgets import QApplication, QPushButton, QAction from PyQt5.QtCore import QObject, pyqtSignal from PyQt5.QtGui import * … Read more
The problem can be solved in 2 ways: Using lambda functions: In general: obj.signal.connect(lambda param1, param2, …, arg1=val1, arg2= value2, … : fun(param1, param2,… , arg1, arg2, ….)) def fun(param1, param2,… , arg1, arg2, ….): […] where: param1, param2, … : are the parameters sent by the signal arg1, arg2, …: are the extra parameters … Read more
To avoid having these problems it is advisable not to modify this file but to create a new file where we implement a class that uses that design. For example, suppose you have used the MainWindow template in the design.ui file, then convert it to Ui_Design.py like to the following structure: from PyQt5 import QtCore, … Read more