qtmodern is a Python package aimed to make PyQt/PySide applications look better and consistent on multiple platforms. It provides a custom frameless window and a dark theme. In order to be compatible with multiple Python Qt wrappers QtPy is used. The initial idea comes from this project.

The recommended way to install is by using pip, i.e:

pip install qtmodern

In order to use qtmodern, simply apply the style you want to your application and then, create a ModernWindow enclosing the window you want to modernize:

...

app = QApplication()
win = YourWindow()

qtmodern.styles.dark(app)
mw = qtmodern.windows.ModernWindow(win)
mw.show()

...