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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def VerifyStructure(self, parser_mediator, line):
 """Verify that this file is a XChat scrollback log file. Args: parser_mediator (ParserMediator):
 mediates interactions between parsers and other components, such as storage and dfvfs. line (str):
 line from a text file. Returns: bool: True if the line was successfully parsed. """

    structure = self.LOG_LINE

    try:
      parsed_structure = structure.parseString(line)
    except pyparsing.ParseException:
      logger.debug('Not a XChat scrollback log file')
      return False

    try:
      int(parsed_structure.timestamp, 10)
    except ValueError:
      logger.debug('Not a XChat scrollback log file, invalid timestamp string')
      return False

    return True