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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 setup(self):
 """Get start end end date of logfile before starting to parse."""

        if self.mlogfilter.is_stdin:
            # assume this year (we have no other info)
            now = datetime.now()
            self.startDateTime = datetime(now.year, 1, 1, tzinfo=tzutc())
            self.endDateTime = datetime(MAXYEAR, 12, 31, tzinfo=tzutc())

        else:
            logfiles = self.mlogfilter.args['logfile']
            self.startDateTime = min([lf.start +
                                      timedelta(hours=self
                                                .mlogfilter
                                                .args['timezone'][i])
                                      for i, lf in enumerate(logfiles)])
            self.endDateTime = max([lf.end +
                                    timedelta(hours=self
                                              .mlogfilter.args['timezone'][i])
                                    for i, lf in enumerate(logfiles)])

        # now parse for further changes to from and to datetimes
        dtbound = DateTimeBoundaries(self.startDateTime, self.endDateTime)
        self.fromDateTime, self.toDateTime = dtbound(self.mlogfilter
                                                     .args['from'] or None,
                                                     self.mlogfilter
                                                     .args['to'] or None)

        # define start_limit for mlogfilter's fast_forward method
        self.start_limit = self.fromDateTime

        # for single logfile, get file seek position of `to` datetime
        if (len(self.mlogfilter.args['logfile']) == 1 and not
                self.mlogfilter.is_stdin):

            if self.mlogfilter.args['to'] != "end":
                # fast forward, get seek value, then reset file
                logfile = self.mlogfilter.args['logfile'][0]
                logfile.fast_forward(self.toDateTime)
                self.seek_to = logfile.filehandle.tell()
                logfile.filehandle.seek(0)
            else:
                self.seek_to = -1
        else:
            self.seek_to = False