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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 read_log(self, logfile):
 """The read_log method returns a memory efficient generator for rows in a Bro log. Usage: rows = my_bro_reader.read_log(logfile) for row in rows: do something with row Args: logfile: The Bro Log file. """


        # Make sure we're at the beginning
        logfile.seek(0)

        # First parse the header of the bro log
        field_names, _ = self._parse_bro_header(logfile)

        # Note: SO stupid to write a csv reader, but csv.DictReader on Bro
        #       files was doing something weird with generator output that
        #       affected zeroRPC and gave 'could not route _zpc_more' error.
        #       So wrote my own, put a sleep at the end, seems to fix it.
        while 1:
            _line = next(logfile).strip()
            if not _line.startswith('#close'):
                yield self._cast_dict(dict(zip(field_names, _line.split(self.delimiter))))
            else:
                time.sleep(.1) # Give time for zeroRPC to finish messages
                break