title: PySide2 how to use Qtimer like time.sleep
body: <p>I have a simple GUI App, it's a timer with LCD display I have problem with delaying one function that's responsible for counting down the time it's should count down every second, but it's count the minute in one second, it for loop function here the demo of the project</p>
  <pre><code>from PySide2 import QtWidgets , QtCore
  import sys
  from clock_gui import Ui_clock # this is the GUI components
  
  class clockApp(QtWidgets.QMainWindow, Ui_clock):
      def __init__(self):
          super(clockApp,self).__init__()
          self.setupUi(self) # it set up the UI from Ui_clock
          self.min = self.spinBox_min.value()
          self.sec = self.spinBox_sec.value()
          self.button.clicked.connect(self._buttonFunction) # the button 
          self.show() # render the GUI
  
  
      def _buttonFunction(self): # the function that counts down after the button clicked 
          self.total = (self.min *60) + self.sec # take minutes and seconds to one variable  
          if self.total &gt;=1:
             for i in range(self.total):
                 self.total -= 1            
                 # here the problem I want the delay to start here
                 # I can use time.sleep but I want to use Qtimer I try it in different ways, but didn't work there is no error but the Qtimer didn't delay anything 
  
  
                 
  
  
  
  
  app = QtWidgets.QApplication(sys.argv)
  window  = clockApp()
  app.exec_()
  </code></pre>
  <p>I try setInterval and I try singleShot but nothing works, maybe I use them wrong?</p>