def upkeep():
    """Does upkeep (like flushing, garbage collection, etc.)"""
    # Just in case, let's clear the exception info.
    try:
        sys.exc_clear()
    except __HOLE__:
        # Python 3 does not have sys.exc_clear. The except statement clears
        # the info itself (and we've just entered an except statement)
        pass
    if os.name == 'nt':
        try:
            import msvcrt
            msvcrt.heapmin()
        except ImportError:
            pass
        except IOError: # Win98
            pass
    if conf.daemonized:
        # If we're daemonized, sys.stdout has been replaced with a StringIO
        # object, so let's see if anything's been printed, and if so, let's
        # log.warning it (things shouldn't be printed, and we're more likely
        # to get bug reports if we make it a warning).
        if not hasattr(sys.stdout, 'getvalue'):
            # Stupid twisted sometimes replaces our stdout with theirs, because
            # "The Twisted Way Is The Right Way" (ha!).  So we're stuck simply
            # returning.
            log.warning('Expected cStringIO as stdout, got %r.', sys.stdout)
            return
        s = sys.stdout.getvalue()
        if s:
            log.warning('Printed to stdout after daemonization: %s', s)
            sys.stdout.seek(0)
            sys.stdout.truncate() # Truncates to current offset.
        s = sys.stderr.getvalue()
        if s:
            log.error('Printed to stderr after daemonization: %s', s)
            sys.stderr.seek(0)
            sys.stderr.truncate() # Truncates to current offset.
    doFlush = conf.supybot.flush() and not starting
    if doFlush:
        flush()
        # This is so registry._cache gets filled.
        # This seems dumb, so we'll try not doing it anymore.
        #if registryFilename is not None:
        #    registry.open(registryFilename)
    if not dying:
        if minisix.PY2:
            log.debug('Regexp cache size: %s', len(re._cache))
        log.debug('Pattern cache size: %s', len(ircutils._patternCache))
        log.debug('HostmaskPatternEqual cache size: %s',
                  len(ircutils._hostmaskPatternEqualCache))
        #timestamp = log.timestamp()
        if doFlush:
            log.info('Flushers flushed and garbage collected.')
        else:
            log.info('Garbage collected.')
    collected = gc.collect()
    if gc.garbage:
        log.warning('Noncollectable garbage (file this as a bug on SF.net): %s',
                    gc.garbage)
    return collected
dataset/ETHPy150Open ProgVal/Limnoria/src/world.py/upkeep