pyqt5 uses cv2 to display pictures an example of a camera

As shown below:

#! /usr/bin/python3
# coding = utf-8
# from PyQt5 import QtGui,QtCore,Qt
import sys
from PyQt5.QtCore import Qt,pyqtSignal,QSize,QRect,QMetaObject, QCoreApplication, pyqtSlot,QPropertyAnimation,QThread
from PyQt5.QtGui import QIcon, QFont, QPixmap, QPainter, QImage
from PyQt5.QtWidgets import QMainWindow, QApplication

import cv2
from gevent.libev.corecext import SIGNAL, time
from qtpy importQtCore


class mycsms(QMainWindow):
    def __init__(self):
        super(mycsms, self).__init__()
        self.setupUi(self)
        self.image= QImage()
        self.device= cv2.VideoCapture(0)
        self.playTimer= Timer("updatePlay()")
        self.connect(self.playTimer, SIGNAL("updatePlay()"), self.showCamer)

    #  Read the camera 
    def showCamer(self):
        if self.device.isOpened():
            ret, frame= self.device.read()
        else:
            ret = False
        #  Read-write disk mode 
        # cv2.imwrite("2.png",frame)
        #self.image.load("2.png")

        height, width, bytesPerComponent= frame.shape
        bytesPerLine = bytesPerComponent* width
        #  Transform color spatial order 
        cv2.cvtColor(frame, cv2.COLOR_BGR2RGB,frame)
        #  Convert to QImage Object 
        self.image= QImage(frame.data, width, height, bytesPerLine, QImage.Format_RGB888)
        self.view.setPixmap(QPixmap.fromImage(self.image))

if __name__ == "__main__":
    app = QApplication(sys.argv)
    myshow = mycsms()
    myshow.playTimer.start()
    myshow.show()
    sys.exit(app.exec_())

#  Thread class: 
class Timer(QtCore.QThread):

    def __init__(self, signal="updateTime()", parent=None):
        super(Timer, self).__init__(parent)
        self.stoped= False
        self.signal= signal
        self.mutex= QtCore.QMutex()

    def run(self):
        with QtCore.QMutexLocker(self.mutex):
            self.stoped= False
        while True:
            if self.stoped:
                return
            self.emit(QtCore.SIGNAL(self.signal))
            #40 Millisecond transmission 1 Secondary signal 
            time.sleep(0.04)

    def stop(self):
        with QtCore.QMutexLocker(self.mutex):
            self.stoped= True

    def isStoped(self):
        with QtCore.QMutexLocker(self.mutex):
            return self.stoped