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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 _parselog(self, r):
 """ Parse bazaar log file format Args: r (str):
 bzr revision identifier Yields: dict: dict of (attr, value) pairs :: $ bzr log -l1 revno: 1 committer: ubuntu <ubuntu@ubuntu-desktop> branch nick: ubuntu-desktop /etc repository timestamp: Wed 2011-10-12 01:16:55 -0500 message: Initial commit """

        def __parselog(entry):
            """
            Parse bazaar log file format

            Args:
                entry (str): log message string

            Yields:
                tuple: (attrname, value)
            """
            bufname = None
            buf = deque()
            print(entry)
            if entry == ['']:
                return
            for l in itersplit(entry, '\n'):
                if not l:
                    continue
                mobj = self.logrgx.match(l)
                if not mobj:
                    # "  - Log message"
                    buf.append(self._logmessage_transform(l))
                if mobj:
                    mobjlen = len(mobj.groups())
                    if mobjlen == 2:
                        # "attr: value"
                        attr, value = mobj.groups()
                        if attr == 'message':
                            bufname = 'desc'
                        else:
                            attr = self.field_trans.get(attr, attr)
                            yield (self.field_trans.get(attr, attr), value)
                    else:
                        raise Exception()
            if bufname is not None:
                if len(buf):
                    buf.pop()
                    len(buf) > 1 and buf.popleft()
                yield (bufname, '\n'.join(buf))
            return

        kwargs = dict(__parselog(r))  # FIXME
        if kwargs:
            if 'tags' not in kwargs:
                kwargs['tags'] = tuple()
            else:
                kwargs['tags'].split(' ')  # TODO
            if 'branchnick' not in kwargs:
                kwargs['branchnick'] = None
            try:
                yield kwargs  # TODO
                # return self._tuple(**kwargs)
            except:
                log.error(r)
                log.error(kwargs)
                raise
        else:
            log.error("failed to parse: %r" % r)