old_contents: import moderngl
  from demosys.conf import settings
  from demosys.utils.module_loading import import_string
  
  # Window instance shortcut
  WINDOW = None  # noqa
  
  
  def window(raise_on_error=True) -> 'demosys.context.base.Window':
      """
      The window instance we are rendering to
  
      :param raise_on_error: Raise an error if the window is not created yet
      """
      if not WINDOW and raise_on_error:
          raise RuntimeError("Attempting to get window before creation")
  
      return WINDOW
  
  
  def ctx() -> moderngl.Context:
      """ModernGL context"""
      win = window()
      if not win.ctx:
          raise RuntimeError("Attempting to get context before creation")
  
      return win.ctx
  
  
  def create_window():
      if window(raise_on_error=False):
          raise RuntimeError("Attempting to create window twice")
  
      window_cls_name = settings.WINDOW.get('class', 'demosys.context.pyqt.Window')
      window_cls = import_string(window_cls_name)
      new_window = window_cls()
      new_window.print_context_info()
      return new_window
  
new_contents: import moderngl
  
  from demosys.conf import settings
  from demosys.utils.module_loading import import_string
  from demosys.context.base import BaseWindow
  
  # Window instance shortcut
  WINDOW = None  # noqa
  
  
  def window(raise_on_error=True) -> BaseWindow:
      """
      The window instance we are rendering to
  
      :param raise_on_error: Raise an error if the window is not created yet
      """
      if not WINDOW and raise_on_error:
          raise RuntimeError("Attempting to get window before creation")
  
      return WINDOW
  
  
  def ctx() -> moderngl.Context:
      """ModernGL context"""
      win = window()
      if not win.ctx:
          raise RuntimeError("Attempting to get context before creation")
  
      return win.ctx
  
  
  def create_window():
      if window(raise_on_error=False):
          raise RuntimeError("Attempting to create window twice")
  
      window_cls_name = settings.WINDOW.get('class', 'demosys.context.pyqt.Window')
      window_cls = import_string(window_cls_name)
      new_window = window_cls()
      new_window.print_context_info()
      return new_window
  
subject: Fix test issue related to pyflakes upgrade