PyQt5 runs system commands and gets the output

getOutputPyQt5Sample.py

#!/usr/bin/env python3
#
# PyQt5 executes commands on the windows system and gets the output.
# Package: pyinstaller -y -F -w pyqt5RunCommandSample.py
# Require: Python==3.6.8 PyQt5==5.15.0 PyInstaller==3.6
#


import re
import sys
import subprocess

from PyQt5.QtWidgets import (QWidget, QToolTip, QPushButton, QApplication, QMessageBox)
from PyQt5.QtGui import QFont


class Ui_Main(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()
    
    def initUI(self):
        QToolTip.setFont(QFont('SansSerif', 10))
        self.setGeometry(500, 300, 300, 200)
        self.setWindowTitle('Command Widget')

        btn = QPushButton('GetIP', self)
        btn.resize(btn.sizeHint())
        btn.move(50, 50)
        btn.clicked.connect(self.getOutput)

    def getOutput(self):
        si = subprocess.STARTUPINFO()
        si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
        ipconfig = 'C:\\Windows\\System32\\ipconfig.exe'
        findstr = 'C:\\Windows\\System32\\findstr.exe'
        cmd = '%s | %s IPv4' % (ipconfig, findstr)
        message = ''
        try:
            p = subprocess.Popen(cmd, shell=True, startupinfo=si, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE, universal_newlines=True)
            output, errors = p.communicate(timeout=5)
            splitlist = re.split('[\r\n:]', output)
            localIP = splitlist[1].strip()
        except:
            message = 'Command Error, Please Check it.'
        message = 'Your IP is %s' % localIP
        QMessageBox.information(self, "Tips", message)


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