def tagstring(self, *args):
if len(args):<EOL><INDENT>self._str_tag = args[<NUM_LIT:0>]<EOL>self._b_tag   = True<EOL><DEDENT>else:<EOL><INDENT>return self._str_tag<EOL><DEDENT>
get/set the tag string itself.

If called with non-zero length argument, will toggle the
internal b_tag flag to True.

The tagstring, if flagged TRUE and non-zero length, will
prepend each output log line. In this manner, it's possible
to post-filter log files for specific tags.

tagstring():            returns the current tagstring
tagstring(<string>):    sets the tagstring to <string>