如何使用字符串在pyqt中加载ui

pip install pyqt5

from PyQt5 import QtWidgets, uic

app = QtWidgets.QApplication([])

def load_ui_string(ui_string):
    # 创建一个空的QWidget窗口
    widget = QtWidgets.QWidget()

    # 使用uic模块的loadUi函数加载UI字符串
    uic.loadUi(ui_string, widget)

    # 返回加载后的窗口
    return widget

ui_string = '''
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QLabel" name="label">
      <property name="text">
       <string>Hello, PyQt!</string>
      </property>
     </widget>
    </item>
   </layout>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>
'''

window = load_ui_string(ui_string)
window.show()