pip install PyQt5
pip install PyQt5-tools  # 包含 Qt Designer 等工具

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel

class MyWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("PyQt 示例")
        self.setGeometry(100, 100, 400, 300)
        
        label = QLabel("Hello PyQt!", self)
        label.move(50, 50)

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

designer

pyuic5 input.ui -o output.py

from PyQt5 import QtWidgets
from output import Ui_MainWindow

class MyApp(QtWidgets.QMainWindow, Ui_MainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        # 添加你的邏輯代碼

<Python安裝目錄>\Lib\site-packages\qt5_applications\Qt\bin\designer.exe

<Python安裝目錄>\Lib\site-packages\PyQt5\Qt\bin\designer.exe

-m PyQt5.uic.pyuic $FileName$ -o $FileNameWithoutExtension$.py

-m PyQt5.pyrcc_main $FileName$ -o $FileNameWithoutExtension$_rc.py

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication, QMainWindow, QTreeWidgetItem,QWidget,QPushButton,QHBoxLayout
from DLMainWindow import Ui_MainWindow
from DLConnectUI import Ui_DLTcpUdp
from DLBase.DLNet.DLTcpClient import DLTcpClient
from DLBase.DLNet.DLTcpServer import DLTcpSever

class DLConnect(QWidget):
    def __init__(self, parent=None):
        super(DLConnect, self).__init__(parent)
        self._ui = Ui_DLTcpUdp()
        self._ui.setupUi(self)

class DLTcpUdpMain(QMainWindow):
    def __init__(self, parent=None):
        super(DLTcpUdpMain, self).__init__(parent)
        self._ui = Ui_MainWindow()
        self._ui.setupUi(self)
        self.InitTreeWidget()
        self.InitConnectTab()
        self._ui.splitter.setStretchFactor(1, 3);
        self.resize(1200, 800)


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

pip install pyqt5-tools

pyqt5-tools preview ui/main_window.ui

from pyqt5_reloader import run
run('main.py')

<RCC>
  <qresource prefix="/">
    <file>images/icon.png</file>
  </qresource>
</RCC>

from PyQt5.QtCore import Qt
QApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
QApplication.setAttribute(Qt.AA_UseHighDpiPixmaps)

pyinstaller --onefile --windowed --icon=app.ico main.py

a = Analysis(
    ['main.py'],
    datas=[('ui/main_window.ui', 'ui'), ('resources_rc.py', '.')],
    ...
)