昨天想着用 Python 写个展示的 demo，之前打算熟悉一下 PyQt ，正好边学边做，学以致用。

主要的流程是在 cmd 下运行 .exe 并读取输出结果，运到的困难是如何实时回传数据以及修改图片大小并显示（缩放到固定大小）。

以下是代码，只展示框架，部分参数未设置。基于 Python3 + PyQt5

import osimport time import sys import subprocessfrom configparser import ConfigParserfrom PyQt5.QtWidgets import *from PyQt5.QtGui import *from PyQt5.QtCore import *  class Example(QMainWindow):        def __init__(self):        super().__init__()                self.initUI()                    def initUI(self):             self.command = ""        self.inipath = r""        self.cf = ConfigParser()        self.cf.read(self.inipath)        main_ground = QWidget()        self.setCentralWidget(main_ground)        grid = QGridLayout()        grid.setSpacing(10)                self.title = QLabel('Result',self)        self.titleEdit = QLineEdit(self)        self.label = QLabel("photo",self)                self.title.setGeometry(30,30,50,25)        self.title.setFont(QFont('SansSerif', 12))                """        grid.addWidget(self.title,1,0)        grid.addWidget(self.titleEdit,1,1)        grid.addWidget(self.label,2,0,5,5)        main_ground.setLayout(grid)        """                     self.statusBar()        QAction()        QAction.triggered.connect()                 menubar = self.menuBar()        RunMenu = menubar.addMenu('&Run')        RunMenu.addAction()             EditMenu = menubar.addMenu('&Edit')        EditMenu.addAction()                self.setGeometry(300, 300, 740, 480)        self.setWindowTitle('VehicleDetect')        #self.setWindowFlags(Qt.WindowMinimizeButtonHint) #禁止调整窗口大小        self.setFixedSize(self.width(), self.height())        self.show()             def Action(self):        self.cf.set()        self.cf.write(open(self.inipath,'w'))        self.showDialog()        if self.fname[0]:            self.command = ''            subprocess.call(self.command)            print("\n",end = "")            return                   def showDialog(self):        self.fname = QFileDialog.getOpenFileName(self, 'Open file', r'D:\')          return        def update_item_data(self,data):        self.titleEdit.setText(data)        ResultPath = r''        imglist = os.listdir(ResultPath)        if int(data):            imgshow = os.path.join(ResultPath,imglist[-1])            image = QImage()                        image.load(imgshow)            #self.label.setPixmap(QPixmap(imgshow))            self.label.setPixmap(QPixmap.fromImage(image).scaled(self.label.size(), Qt.KeepAspectRatio, Qt.SmoothTransformation));class UpdateData(QThread):    data = pyqtSignal(str)    cnt = 0    def run(self):        while(True):            cnt = len(os.listdir(r''))            self.data.emit(str(cnt))            time.sleep(1)                                        if __name__ == '__main__':       app = QApplication(sys.argv)    ex = Example()        update_thread = UpdateData()    update_thread.data.connect(ex.update_item_data)    update_thread.start()        sys.exit(app.exec_())