import sys
import numpy as np
from PyQt5.QtWidgets import QApplication, QMainWindow
import pyqtgraph as pgclass MainWindow(QMainWindow):def __init__(self):super().__init__()self.plot_widget = pg.PlotWidget(title='实时更新的柱状图')self.setCentralWidget(self.plot_widget)self.data = np.random.rand(10)  # 初始数据（模拟数据）self.bars1 = pg.BarGraphItem(x=np.arange(10), height=self.data, width=0.8, brush='g')self.bars2 = pg.BarGraphItem(x=np.arange(10), height=self.data, width=0.8, brush='r')self.plot_widget.addItem(self.bars2)self.plot_widget.addItem(self.bars1)self.timer = pg.QtCore.QTimer()  # 创建定时器self.timer.timeout.connect(self.update_data_and_plot)  # 连接定时器超时信号与更新数据和绘制方法self.timer.start(100)  # 设置定时器间隔为1秒def update_data_and_plot(self):self.data = np.random.rand(10)  # 更新数据（模拟新的随机数据）self.bars2.setOpts(x=np.arange(10), height=[10] * 10)  # 更新柱状图数据self.bars1.setOpts(x=np.arange(10), height=self.data)  # 更新柱状图数据if __name__ == '__main__':app = QApplication(sys.argv)main_window = MainWindow()main_window.show()sys.exit(app.exec_())