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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 get_version_history_for_file(self, filepath):
 """ Return a dict representation of this file's commit history This uses specially formatted git-log output for easy parsing, as described here: http://blog.lost-theory.org/post/how-to-parse-git-log-output/ For a full list of available fields, see: http://linux.die.net/man/1/git-log """

        # define the desired fields for logout output, matching the order in these lists!
        GIT_COMMIT_FIELDS = ['id',
                             'author_name',
                             'author_email',
                             'date',
                             'date_ISO_8601',
                             'relative_date',
                             'message_subject',
                             'message_body']
        GIT_LOG_FORMAT = ['%H', '%an', '%ae', '%aD', '%ai', '%ar', '%s', '%b']
        # make the final format string, using standard ASCII field/record delimiters
        GIT_LOG_FORMAT = '%x1f'.join(GIT_LOG_FORMAT) + '%x1e'
        try:
            log = git(self.gitdir,
                      self.gitwd,
                      '--no-pager',
                      'log',
                      '--format=%s' % GIT_LOG_FORMAT,
                      '--follow',  # Track file's history when moved/renamed...
                      '--find-renames=100%',  # ... but only if the contents are identical!
                      '--',
                      filepath)
            # _LOG.debug('log said "{}"'.format(log))
            log = log.strip('\n\x1e').split("\x1e")
            log = [row.strip().split("\x1f") for row in log]
            log = [dict(zip(GIT_COMMIT_FIELDS, row)) for row in log]
        except:
            _LOG.exception('git log failed')
            raise
        return log