如何使用python中的pyqt5提取数据帧标头值并存储在qlistwidget中

from PyQt5.QtWidgets import QApplication, QMainWindow, QListWidget, QListWidgetItem
from PyQt5.QtCore import Qt

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.listWidget = QListWidget(self)
        self.setCentralWidget(self.listWidget)
        self.setWindowTitle("Data Frame Header Extraction")
        self.show()

    def extractHeader(self, data_frame):
        header = data_frame[:4]  # 假设标头值在数据帧的前4个字节
        item = QListWidgetItem(header.decode(), self.listWidget)
        item.setFlags(item.flags() | Qt.ItemIsEditable)  # 允许编辑标头值

if __name__ == "__main__":
    app = QApplication([])
    mainWindow = MainWindow()
    data_frame = b"ABCD"  # 假设数据帧为字节串
    mainWindow.extractHeader(data_frame)
    app.exec_()