code: def truncatechars(value, arg):
      
      try:
          length = int(arg)
      except ValueError: # Invalid literal for int().
          return value # Fail silently.
      if len(value) > length:
          return value[:length] + '...'
      return value
docs: Truncates a string after a certain number of chars.
  
      Argument: Number of chars to truncate after.