title: How to make my title less Window drag-able in PyQt5?
body: <p>I want to build a window which has <em>no title bar</em>, so i do. But it is not any more draggable. You cannot make my window move from here to there. </p>
  
  <p>I know it is because of me, removing the title bar, but how to fix it?</p>
  
  <p><strong>This is my code:</strong></p>
  
  <pre><code>from PyQt5 import QtWidgets, QtCore
  from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel, QWidget
  import sys
  
  
  def window():
      app = QApplication(sys.argv)
      win = QMainWindow()
      win.setGeometry(300, 300, 300, 300)
      win.setWindowTitle("Test")
      win.setWindowFlags(QtCore.Qt.FramelessWindowHint)
  
      label = QLabel(win)
      label.setText("Hello world")
  
      win.show()
      sys.exit(app.exec_())
  
  
  window()
  </code></pre>
  
  <p>Any help will be appreciated. Please help me with this...</p>