[python][pyqt5]pyqt5安装后测试代码

import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QVBoxLayout, QWidget, QLabel
from PyQt5.QtGui import QPalette, QPixmap
class QLabelDemo(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()
    def initUI(self):
        label1 = QLabel(self)
        label2 = QLabel(self)
        label3 = QLabel(self)
        label4 = QLabel(self)
        label1.setText("<font color=yellow>pyqt5 hello world</font>")
        label1.setAutoFillBackground(True)
        patette = QPalette()
        patette.setColor(QPalette.Window, Qt.blue)
        label1.setPalette(patette)
        label1.setAlignment(Qt.AlignCenter)
        label2.setText("<a href='#'>Python GUI Demo</a>")
        label3.setAlignment(Qt.AlignCenter)
        label3.setToolTip('this is a label')
        label3.setPixmap(QPixmap("about_us_bk.jpg"))
        label4.setOpenExternalLinks(True)
        label4.setText('<a href=https://www.baidu.com>baidu</a>')
        label4.setAlignment(Qt.AlignRight)
        label4.setToolTip('this is hyper text')

        vbox = QVBoxLayout()
        vbox.addWidget(label1)
        vbox.addWidget(label2)
        vbox.addWidget(label3)
        vbox.addWidget(label4)

        label2.linkHovered.connect(self.linkHovered)
        label4.linkActivated.connect(self.linkClicked)

        self.setLayout(vbox)
        self.setWindowTitle('pyqt5 demo')
        self.setFixedSize(0, 480)

    def linkHovered(self):
        print('labe2 hover')

    def linkClicked(self):
        print('label4 clicked')


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = QLabelDemo()
    main.show()
    sys.exit(app.exec_())

结果：