[PyQt5] How to pause , resume & stop QThread.

from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import sys
import time

class main(QWidget):
    finieshed=pyqtSignal()
    Signal=pyqtSignal()
    def __init__(self):
        super(main,self).__init__()
        vb=QVBoxLayout()
        self.StartAndPauseBtn=QPushButton('Start')
        self.StopBtn=QPushButton('Stop')


        vb.addWidget(self.StartAndPauseBtn)
        vb.addWidget(self.StopBtn)
        self.setLayout(vb)

        self.worker=worker()
        self.mythread=QThread()
        self.worker.moveToThread(self.mythread)
        self.mythread.start()

        self.StartAndPauseBtn.clicked.connect(self.on_startBtn)

        self.StopBtn.clicked.connect(self.on_stopBtn)
        self.StopBtn.setDisabled(1) #stop button disabled change to 1 or True to be enable

    def on_startBtn(self):
        try:
            if self.StartAndPauseBtn.text()=="Start":
                self.Signal.connect(self.worker.start)
                self.Signal.emit()

                self.worker.signal.connect(self.worker.start)
                self.worker.Stop=False   # look will work and not stopped
                self.worker.Pause=True # loop will work and not paused
                self.StartAndPauseBtn.setText('Pause')
                self.StopBtn.setDisabled(0) #stop buttn will be enable
            else:
                self.StartAndPauseBtn.setText('Start')
                self.worker.Paus_Thread()
                self.worker.Stop=False # it will make thee loop Pause

        except Exception as e:
            print(str(e))

    def on_stopBtn(self):
        self.worker.stop_thread() #loop will be stopped
        self.StartAndPauseBtn.setText('Start')
        print('Stopped')
        self.StopBtn.setDisabled(1) #stop button will be disable

class worker(QObject):
    signal=pyqtSignal()
    def __init__(self):
        super(worker,self).__init__()

        self.Pause = True
        self.Stop=False

    def start(self):
        for i in range(15):
            if not self.Pause:
                print('paused')
                while not self.Pause : #if this be True it will sleep or pause the loop
                    time.sleep(1)
            if not self.Stop:  # if this be true  it will stop the loop
                print(i)
                time.sleep(1)


    def Paus_Thread(self):
        self.Pause=False

    def stop_thread(self):
        self.Stop=True
        self.Pause=True

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