pythonQt5示例

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton

class Example(QWidget):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        btn = QPushButton('Button', self)
        btn.clicked.connect(self.buttonClicked)
        btn.resize(btn.sizeHint())
        btn.move(50, 50)

        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Signal and slot')
        self.show()

    def buttonClicked(self):
        print('Button clicked!')

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())