code: def _padded_hex(i, pad_width=4, uppercase=True):
      
      result = hex(i)[2:]  # Remove the leading "0x"
      if uppercase:
          result = result.upper()
      return result.zfill(pad_width)
docs: Helper function for taking an integer and returning a hex string.  The string will be padded on the left with zeroes
      until the string is of the specified width.  For example:
  
      _padded_hex(31, pad_width=4, uppercase=True) -> "001F"
  
      :param i: integer to convert to a hex string
      :param pad_width: (int specifying the minimum width of the output string.  String will be padded on the left with '0'
                        as needed.
      :param uppercase: Boolean indicating if we should use uppercase characters in the output string (default=True).
      :return: Hex string representation of the input integer.