在这些情况下，最佳实践是创建一个QObject，将其导出到QML并在那里进行连接，这也是在C ++中完成的。
from pyside2.QtCore import QObject, QUrl, Slot
from pyside2.QtGui import QGuiApplication
from pyside2.QtQml import QQmlApplicationEngine
class Foo(QObject):
@Slot(str)
def test_slot(self, string):
print(string)
if __name__ == "__main__":
import os
import sys
app = QGuiApplication()
foo = Foo()
engine = QQmlApplicationEngine()
engine.rootContext().setContextProperty("foo", foo)
qml_file = "main.qml"
current_dir = os.path.dirname(os.path.realpath(__file__))
filename = os.path.join(current_dir, qml_file)
engine.load(QUrl.fromLocalFile(filename))
if not engine.rootObjects():
sys.exit(-1)
sys.exit(app.exec_())
import QtQuick 2.13
import QtQuick.Controls 2.13
ApplicationWindow {
visible: true
Button {
anchors.centerIn: parent
text: "Example"
onClicked: foo.test_slot("Test")
}
}
所有C ++ / QML良好实践也都适用于Python / QML，且更改和限制最少。
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