from PySide.QtCore import * from PySide.QtGui import * from PySide.QtDeclarative import * import sys import gc def register_qml_types(): class TestClass(QDeclarativeItem): def __init__(self, parent = None): QDeclarativeItem.__init__(self, parent) qmlRegisterType(TestClass, "UserTypes", 1, 0, "TestClass") def main(): app = QApplication([]) # reg qml types here register_qml_types() # force gc to run gc.collect() view = QDeclarativeView() url = QUrl(__file__.replace(".py", ".qml")) view.setSource(url) if __name__ == "__main__": main()