import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import *
from PyQt5.QtWidgets import QFileDialog, QMessageBox, QDockWidget, QListWidget
from PyQt5.QtGui import *from Ui_Login import Ui_Login_Window  #由.UI文件生成.py文件后，导入创建的GUI类from Main import * # Main.py为 主窗口代码文件from class_MSSQL import MSSQL#QtWidgets.QMainWindow：继承该类方法
class Login_window(QtWidgets.QMainWindow,Ui_Login_Window):  #__init__: 析构函数，也就是类被创建后就会预先加载的项目。# 马上运行，这个方法可以用来对你的对象做一些你希望的初始化。def __init__(self):  #这里需要重载一下Login_window，同时也包含了QtWidgets.QMainWindow的预加载项。super(Login_window, self).__init__()  self.setupUi(self)# 将点击事件与槽函数进行连接
        self.btn_login.clicked.connect(self.btn_login_fuc) #登录按钮 函数def btn_login_fuc(self):#1 获取输入的账户和密码account = self.txt_1.text()  # 记得text要打括号（）！password = self.txt_2.text()if account == "" or password == "":reply = QMessageBox.warning(self,"警告","账号密码不能为空，请输入！")return#2 查询数据库，判定是否有匹配ms = MSSQL()result = ms.Login_result(account, password)if(len(result) > 0):#1打开新窗口
            Ui_Main.show()#2关闭本窗口
            self.close()else:reply = QMessageBox.warning(self,"警告","账户或密码错误，请重新输入！")if __name__ == '__main__': #如果这个文件是主程序。app = QtWidgets.QApplication(sys.argv) #QApplication相当于main函数，也就是整个程序（很多文件）的主入口函数。对于GUI程序必须至少有一个这样的实例来让程序运行。window = Login_window() #生成一个实例（对象）Ui_Main = Ui_Main() #生成主窗口的实例window.show() #有了实例，就得让它显示。这里的show()是QWidget的方法，用来显示窗口。sys.exit(app.exec_()) # 调用sys库的exit退出方法，条件是app.exec_()也就是整个窗口关闭。

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *from Ui_Main import Ui_MainWindow  #由.UI文件生成.py文件后，导入创建的GUI类import math
from PIL import Image, ImageDraw, ImageFont
import numpy as np
import os
import cv2 as cvcvfrom class_Detection import Detectionclass Ui_Main(QtWidgets.QMainWindow,Ui_MainWindow):  def __init__(self): super(Ui_Main, self).__init__()  self.setupUi(self)# 将点击事件与槽函数进行连接
        self.btn_video.clicked.connect(self.btn_video_fuc)def btn_video_fuc(self):filename = QFileDialog.getOpenFileName(self,'open file','./')self.timer_camera = QTimer(self)self.cap = cvcv.cv2.VideoCapture(filename[0])self.timer_camera.timeout.connect(self.show_pic)self.timer_camera.start(10) #1毫秒def show_pic(self):dc = Detection()success,frame = self.cap.read()if success:show = dc.process_image(frame)showImage = QImage(show.data, show.shape[1], show.shape[0],QImage.Format_RGB888)self.label.setPixmap(QPixmap.fromImage(showImage)) self.label.setScaledContents(True)  #图片自适应self.timer_camera.start(10)if __name__ == '__main__': app = QtWidgets.QApplication(sys.argv) window = Ui_Main()window.show() sys.exit(app.exec_())