效果预览

hello.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0"><class>Dialog</class><widget class="QDialog" name="Dialog"><property name="geometry"><rect><x>0</x><y>0</y><width>400</width><height>300</height></rect></property><property name="windowTitle"><string>Dialog</string></property><widget class="QPushButton" name="pushButton"><property name="geometry"><rect><x>100</x><y>120</y><width>75</width><height>24</height></rect></property><property name="text"><string>你好，QT</string></property></widget></widget><resources/><connections/>
</ui>

hello.py

# Form implementation generated from reading ui file 'hello.ui'
#
# Created by: PyQt6 UI code generator 6.4.2
#
# WARNING: Any manual changes made to this file will be lost when pyuic6 is
# run again.  Do not edit this file unless you know what you are doing.from PyQt6 import QtCore, QtGui, QtWidgetsclass Ui_Dialog(object):def setupUi(self, Dialog):Dialog.setObjectName("Dialog")Dialog.resize(400, 300)self.pushButton = QtWidgets.QPushButton(parent=Dialog)self.pushButton.setGeometry(QtCore.QRect(100, 120, 75, 24))self.pushButton.setObjectName("pushButton")self.retranslateUi(Dialog)QtCore.QMetaObject.connectSlotsByName(Dialog)def retranslateUi(self, Dialog):_translate = QtCore.QCoreApplication.translateDialog.setWindowTitle(_translate("Dialog", "Dialog"))self.pushButton.setText(_translate("Dialog", "你好，QT"))

main.py

import hello
import sys
from PyQt6.QtWidgets import QApplication, QMainWindowif __name__ == '__main__':app = QApplication(sys.argv)window = QMainWindow()ui = hello.Ui_Dialog()ui.setupUi(window)window.show()sys.exit(app.exec())