pyqt5 example of using cv2 to display images, camera

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

import cv2
from  import SIGNAL, time
from qtpy importQtCore


class mycsms(QMainWindow):
    def __init__(self):
        super(mycsms, self).__init__()
        (self)
        = QImage()
        = (0)
        = Timer("updatePlay()")
        (, SIGNAL("updatePlay()"), )

    # Read the camera
    def showCamer(self):
        if ():
            ret, frame= ()
        else:
            ret = False
        # Read and write disk mode
        # ("",frame)
        #("")

        height, width, bytesPerComponent= 
        bytesPerLine = bytesPerComponent* width
        # Transform color space order
        (frame, cv2.COLOR_BGR2RGB,frame)
        # to QImage objects
        = QImage(, width, height, bytesPerLine, QImage.Format_RGB888)
        (())

if __name__ == "__main__":
    app = QApplication()
    myshow = mycsms()
    ()
    ()
    (app.exec_())

# Thread class:
class Timer():

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

    def run(self):
        with ():
            = False
        while True:
            if :
                return
            (())
            #40 milliseconds to send a signal
            (0.04)

    def stop(self):
        with ():
            = True

    def isStoped(self):
        with ():
            return