title: time.sleep() and BackGround Windows PyQt5
body: <p><br>
  given that, I'm starting with the PyQt5 module, I'm still slowly understanding the logic behind it. That said, I'm having a problem that I can not find an answer to and I hope you can help me.<br>
  I have this script:</p>
  
  <pre><code>import sys, socket, time
  from PyQt5.QtWidgets import *
  from PyQt5.QtCore import *
  from PyQt5.QtGui import *
  from io import BytesIO as by
  
  class loadGame(QWidget):
      wLoadDisplay = 768
      hLoadDisplay = 576
      wLoadBar = 650
      hLoadBar = 40
  
      pbarCSS = """
      QProgressBar
      {
          font-size: 20px;
          font-weight: bold;
          background-color: #FFF;
          border: 4px solid #000;
          text-align: center;
      }
      QProgressBar::chunk
      {
          background-color: #FF0000;
          width: 1px;
      }
      """
  
      labelCSS = """
      QLabel
      {
          font-size: 20px;
          font-weight: bold;
          background-color: #FFF;
          border: 4px solid #000;
      }
      """
  
      fileResource = []
      imgResource = []
      vidResource = []
      audResource = []
      diaResource = []
      txtResource = []
  
      internetConnection = False
  
      def __init__(self, *args, **kwargs):
          QWidget.__init__(self, *args, **kwargs)
  
          self.outputFile = by()
  
          self.pbar = QProgressBar(self)
          self.pbar.setGeometry((self.wLoadDisplay / 2 - self.wLoadBar / 2), (self.hLoadDisplay / 2 - self.hLoadBar * 2),
                                self.wLoadBar, self.hLoadBar)
          self.pbar.setFormat("%v/%m")
          self.pbar.setValue(0)
          self.pbar.setStyleSheet(self.pbarCSS)
  
          self.label = QLabel(self)
          self.label.setGeometry((self.wLoadDisplay / 2 - self.wLoadBar / 2), (self.hLoadDisplay / 2),
                                 self.wLoadBar, self.hLoadBar)
          self.label.setAlignment(Qt.AlignCenter | Qt.AlignVCenter)
          self.label.setStyleSheet(self.labelCSS)
  
          self.setGeometry(0, 0, self.wLoadDisplay, self.hLoadDisplay)
          oImage = QImage("bgloading.png")
          sImage = oImage.scaled(QSize(self.wLoadDisplay, self.hLoadDisplay))
          palette = QPalette()
          palette.setBrush(10, QBrush(sImage))
          self.setPalette(palette)
  
          qtRectangle = self.frameGeometry()
          centerPoint = QDesktopWidget().availableGeometry().center()
          qtRectangle.moveCenter(centerPoint)
          self.move(qtRectangle.topLeft())
  
          self.run()
  
      def run(self):
          self.checkConnection()
          if self.internetConnection:
              self.checkUpdate()
          else:
              pass
  
      def checkConnection(self):
          self.objectChange("Check Internet Connection", 1)
          try:
              host = socket.gethostbyname("www.google.it")
              s = socket.create_connection((host, 80), 2)
              self.internetConnection = True
          except:
              pass
  
          self.count()
          self.reset()
  
      def checkUpdate(self):
          pass
  
      def objectChange(self, object, n):
          self.label.setText(object)
          self.pbar.setMaximum(n)
  
      def count(self):
          self.pbar.setValue(self.pbar.value() + 1)
  
      def reset(self):
          time.sleep(2)
          self.pbar.setMaximum(0)
          self.pbar.setValue(0)
          self.label.setText("...")
  
  if __name__ == '__main__':
      loadDisplay = QApplication(sys.argv)
      load = loadGame()
      load.show()
      sys.exit(loadDisplay.exec_())
  </code></pre>
  
  <p>Searching on the web, I discovered that the problem is related to "time.sleep (2)", that is, the instruction blocks the window that does not appear until two seconds have passed.<br>
  The fact is that I would like to spend one or two seconds, showing the completion of the bar, before resetting and move on to the next statement contained in "def run (self)".<br>
  So, is there a way to make that pause, without using the Time module? I do not know, maybe with QTimer? I repeat, I do not know much about PyQt5 yet, so I'm not aware if QTimer can do the same thing.<br>
  If QTimer can not do it, is it possible in any other way? I would like to avoid the "threads" of PyQt5, because I read that it would be possible to do it, but I would like to avoid using it only for the Timer module.<br><br><br>
  I only add one more question, to avoid opening another one and publishing the same script.<br>
  In the script, the window background is done via "oImage = QImage (" bgloading.png ")" etc.<br>
  I noticed, however, that if the file name were found to be wrong, or the file itself is missing, the background is colored black. So, if there are any errors (wrong name or missing file) it's possible set a background, for example, white?<br>
  Because when the window is loaded with "this error", no exception is raised and the script continues.<br><br><br><br>
  Edit: I've edited the published script so that it contains only the PyQt5 part, so you can try it out. Obviously only the image is missing, which can be replaced with any image.<br>
  Unfortunately I had forgotten to write that the part where "self.set_display ()" was reported was to show that once the work performed by PyQt5 was terminated, it would be closed (which was still missing, because using Pycharm I would close the execution of the script from the program). The script would continue by calling the "self.set_display ()" function.</p>
  
  <p>Edit2: I tried, as suggested, to replace "time.sleep (2)", but I get the same result. The problem is that if I do not put the pause, the window appears normally, but the reset happens too quickly and the user does not see the filling of the progress bar. If instead I put "time.sleep (2)" or, the suggested solution, the window appears only after the pause, that is when the reset has already occurred.</p>