old_contents: from PyQt5.QtWidgets import QMainWindow
  
  
  _main_window_geometry = {
      "initial_height": 800,
      "initial_width": 1000,
      "min_height": 400,
      "min_width": 500,
  }
  
  
  class MainWindow(QMainWindow):
  
      def __init__(self):
          super().__init__()
  
          self.initialize()
  
      def initialize(self):
          self.resize(_main_window_geometry["initial_width"],
                      _main_window_geometry["initial_height"])
  
          self.setMinimumWidth(_main_window_geometry["min_width"])
          self.setMinimumHeight(_main_window_geometry["min_height"])
  
new_contents: from PyQt5.QtWidgets import QMainWindow
  
  
  _main_window_geometry = {
      "initial_height": 800,
      "initial_width": 1000,
      "min_height": 400,
      "min_width": 500,
  }
  
  
  class MainWindow(QMainWindow):
  
      def __init__(self):
          super().__init__()
  
          self.initialize()
  
      def initialize(self):
          self.resize(_main_window_geometry["initial_width"],
                      _main_window_geometry["initial_height"])
  
          self.setMinimumWidth(_main_window_geometry["min_width"])
          self.setMinimumHeight(_main_window_geometry["min_height"])
  
          self.setWindowTitle("PyXRF window title")
subject: Test window title on Mac