帮我写一段PYQT5上位机显示波形曲线的代码

以下是一段PYQT5上位机显示波形曲线的代码：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtCore import Qt, QTimer
from PyQt5.QtGui import QPainter, QPen
import numpy as np

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("波形曲线显示")
        self.setGeometry(100, 100, 800, 600)
        self.data = np.zeros(100)
        self.timer = QTimer(self)
        self.timer.timeout.connect(self.update_data)
        self.timer.start(50)

    def update_data(self):
        self.data = np.roll(self.data, -1)
        self.data[-1] = np.random.randint(, 100)

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.setRenderHint(QPainter.Antialiasing)
        painter.setPen(QPen(Qt.red, 2))
        for i in range(len(self.data) - 1):
            x1 = i * 8
            y1 = 500 - self.data[i] * 4
            x2 = (i + 1) * 8
            y2 = 500 - self.data[i + 1] * 4
            painter.drawLine(x1, y1, x2, y2)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())

希望能对你有所帮助！