wxPython's method of using the system clipboard

import wx
########################################################################
class ClipboardPanel():
  """"""
  #----------------------------------------------------------------------
  def __init__(self, parent):
    """Constructor"""
    .__init__(self, parent)
    lbl = (self, label="Enter text to copy to clipboard:")
     = (self, style=wx.TE_MULTILINE)
    copyBtn = (self, label="Copy")
    (wx.EVT_BUTTON, )
    copyFlushBtn = (self, label="Copy and Flush")
    (wx.EVT_BUTTON, )
    sizer = ()
    (lbl, 0, , 5)
    (, 1, )
    (copyBtn, 0, |, 5)
    (copyFlushBtn, 0, |, 5)
    (sizer)
  #----------------------------------------------------------------------
  def onCopy(self, event):
    """"""
     = ()
    (())
    if ():
      ()
      ()
    else:
      ("Unable to open the clipboard", "Error")
  #----------------------------------------------------------------------
  def onCopyAndFlush(self, event):
    """"""
     = ()
    (())
    if ():
      ()
      ()
    else:
      ("Unable to open the clipboard", "Error")
    ().Close()
########################################################################
class ClipboardFrame():
  """"""
  #----------------------------------------------------------------------
  def __init__(self):
    """Constructor"""
    .__init__(self, None, title="Clipboard Tutorial")
    panel = ClipboardPanel(self)
    ()
if __name__ == "__main__":
  app = (False)
  frame = ClipboardFrame()
  ()