old_contents: textbox=None
  entry=None
  def reverse():
      text=entry.get()
      if "-rev " in text:
          text=text.replace("-rev ","")
          l=len(text)
          output=""
          for i in range(l-1,-1,-1):
              output+=text[i]
          textbox.insert('end',"\n"+output)
  
  #without main and privilage function a plugin will be invalid
  def main(textBox_widget, entry_widget):
      global textbox,entry
      textbox=textBox_widget
      entry=entry_widget
      entry.bind("<Return>",lambda x: reverse())
  
  #privilage list elements sequence== function arguments sequence
  def privilage():
      return("textBox",'entry')
new_contents: textbox=None
  entry=None
  def reverse():
      text=entry.get()
      if "-rev " in text:
          text=text.replace("-rev ","")
          l=len(text)
          output=""
          for i in range(l-1,-1,-1):
              output+=text[i]
          textbox.insert('end',"\n"+output)
  
  #without main and privilege function a plugin will be invalid
  def main(textBox_widget, entry_widget):
      global textbox,entry
      textbox=textBox_widget
      entry=entry_widget
      entry.bind("<Return>",lambda x: reverse())
  
  #privilege list elements sequence== function arguments sequence
  def privilege():
      return("textBox",'entry')
  
subject: Update reverse.py