PyQt5: Gtk-CRITICAL **: IA__gtk_widget_style_get: statement "GTK_IS_WIDGET (widget)" failed

Question

I get this error with PyQt5 and I think I get this error only when using QTextEdit. I tried using QLineEdit instead of QTextEdit and it worked without problems. Using QTextEdit, when I open the program, I get this error, and the program runs very slowly. Error: (python:4843): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion 'GTK_IS_WIDGET (widget)' failed

 import sys from PyQt5.QtWidgets import (QWidget, QLabel, QLineEdit, QTextEdit, QGridLayout, QApplication) class Example(QWidget): def __init__(self): super(Example, self).__init__() self.initUI() def initUI(self): title = QLabel('Title') author = QLabel('Author') review = QLabel('Review') titleEdit = QLineEdit() authorEdit = QLineEdit() reviewEdit = QTextEdit() grid = QGridLayout() grid.setSpacing(10) grid.addWidget(title, 1, 0) grid.addWidget(titleEdit, 1, 1) grid.addWidget(author, 2, 0) grid.addWidget(authorEdit, 2, 1) grid.addWidget(review, 3, 0) grid.addWidget(reviewEdit, 3, 1, 5, 1) self.setLayout(grid) self.setGeometry(300, 300, 350, 300) self.setWindowTitle('Review') self.show() if __name__ == '__main__': app = QApplication(sys.argv) ex = Example() sys.exit(app.exec_()) 

Answer 1

I found a solution to this problem. Changing the style of the application did not show an error, and everything worked correctly.

Corrected Code:

 if __name__ == '__main__': app = QApplication(sys.argv) app.setStyle("fusion") #Changing the style ex = Example() sys.exit(app.exec_()) 

More about styles here: http://doc.qt.io/qt-5/gallery.html