如何正确使用python捕获我的屏幕？

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QVBoxLayout
from PyQt5.QtGui import QPixmap, QScreen
from PyQt5.QtCore import QTimer

class ScreenCapture(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.label = QLabel(self)
        self.layout = QVBoxLayout(self)
        self.layout.addWidget(self.label)
        self.setLayout(self.layout)
        self.setGeometry(100, 100, 800, 600)
        self.setWindowTitle('Screen Capture')

        self.timer = QTimer()
        self.timer.timeout.connect(self.capture_screen)
        self.timer.start(1000)  # 每隔1秒捕获一次屏幕

    def capture_screen(self):
        screen = QScreen.grabWindow(QApplication.primaryScreen(), QApplication.desktop().winId())
        pixmap = QPixmap(screen)
        self.label.setPixmap(pixmap)

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