实例1：滑动条+显示

import sysfrom PyQt5.QtCore import Qtfrom PyQt5.QtWidgets import (QWidget, QLCDNumber, QSlider, QVBoxLayout, QApplication)class SigSlot(QWidget):    def __init__(self, parent=None):        QWidget.__init__(self)        self.setWindowTitle('XXOO')        lcd = QLCDNumber(self)        slider = QSlider(Qt.Horizontal, self)        vbox = QVBoxLayout()        vbox.addWidget(lcd)        vbox.addWidget(slider)        self.setLayout(vbox)        slider.valueChanged.connect(lcd.display)        self.resize(350, 250)app = QApplication(sys.argv)qb = SigSlot()qb.show()sys.exit(app.exec_())!/usr/bin/python3 coding = utf-8

实例2：新建窗口

import sysfrom PyQt5.QtWidgets import QApplication, QWidgetif __name__ == '__main__':    app = QApplication(sys.argv)    w = QWidget()    w.resize(600, 600)    w.move(1068, 612)    w.setWindowTitle('天晟出品')    w.show()    sys.exit(app.exec_())

实例3：try...except...的语句，通过这个语句我们实现了：命令行中如果带入参数，窗口的标题就用这个参数代替，否则用默认的“学点编程吧出品”作为窗口的标题。当输入多个参数时，则合并这些参数为一个。

import sysfrom PyQt5.QtWidgets import QApplication, QWidgetif __name__ == '__main__':    app = QApplication(sys.argv)    try:        if len(sys.argv) < 2:            raise ValueError        else:            title = " ".join(sys.argv[1:])    except ValueError:        title = "天晟出品"    w = QWidget()    w.resize(600, 600)    w.move(1068, 612)    w.setWindowTitle(title)    w.show()    sys.exit(app.exec_())

实例4：插入图标

import sysfrom PyQt5.QtWidgets import QApplication, QWidgetfrom PyQt5.QtGui import QIconclass Ico(QWidget):    def __init__(self):        super().__init__()        self.init_ui()    def init_ui(self):        self.setGeometry(1068, 612, 600, 600)        self.setWindowTitle('天晟出品')        self.setWindowIcon(QIcon('ComNet.ico'))        self.show()if __name__ == '__main__':    app = QApplication(sys.argv)    ex = Ico()    sys.exit(app.exec_())

实例5：点击按钮退出

import sysfrom PyQt5.QtWidgets import QApplication, QWidget, QPushButtonfrom PyQt5.QtGui import QIconfrom PyQt5.QtCore import QCoreApplicationclass Ico(QWidget):    def __init__(self):        super().__init__()        self.init_ui()    def init_ui(self):        self.setGeometry(1068, 612, 600, 600)        self.setWindowTitle('天晟出品')        self.setWindowIcon(QIcon('ComNet.ico'))        qbtn = QPushButton('退出',self) #新建按钮对象        qbtn.clicked.connect(QCoreApplication.instance().quit) #按钮点击事件        qbtn.resize(100, 100)        qbtn.move(250, 250)        self.show()if __name__ == '__main__':    app = QApplication(sys.argv)    ex = Ico()    sys.exit(app.exec_())