如何在PyQt画布上显示x和y标签？

from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel
from PyQt5.QtCore import Qt

app = QApplication([])
window = QMainWindow()
window.setWindowTitle("Canvas")

x_label = QLabel("x", window)
y_label = QLabel("y", window)

x_label.setGeometry(10, 10, 20, 20)  # 设置x标签的位置和大小
y_label.setGeometry(10, 40, 20, 20)  # 设置y标签的位置和大小

x_label.setAlignment(Qt.AlignCenter)  # 设置x标签的对齐方式为居中
y_label.setAlignment(Qt.AlignCenter)  # 设置y标签的对齐方式为居中

window.show()
app.exec_()