'Implement the function'

def func(self):

    switches = self.switches
    lhslist = self.lhslist
    if (not self.args):
        self.msg('Usage:    @sethelp[/switches]    <topic>[;alias;alias][,category[,locks,..]    =    <text>')
        return
    nlist = len(lhslist)
    topicstr = (lhslist[0] if (nlist > 0) else '')
    if (not topicstr):
        self.msg('You    have    to    define    a    topic!')
        return
    topicstrlist = topicstr.split(';')
    (topicstr, aliases) = (topicstrlist[0], (topicstrlist[1:] if (len(topicstr) > 1) else []))
    aliastxt = (('(aliases:    %s)' % ',    '.join(aliases)) if aliases else '')
    old_entry = None
    try:
        for querystr in topicstrlist:
            old_entry = HelpEntry.objects.find_topicmatch(querystr)
            if old_entry:
                old_entry = list(old_entry)[0]
                break
        category = (lhslist[1] if (nlist > 1) else old_entry.help_category)
        lockstring = (','.join(lhslist[2:]) if (nlist > 2) else old_entry.locks.get())
    except Exception:
        old_entry = None
        category = (lhslist[1] if (nlist > 1) else 'General')
        lockstring = (','.join(lhslist[2:]) if (nlist > 2) else 'view:all()')
    category = category.lower()
    if ('edit' in switches):
        if old_entry:
            topicstr = old_entry.key
            if self.rhs:
                old_entry.entrytext += ('\n%s' % self.rhs)
            helpentry = old_entry
        else:
            helpentry = create.create_help_entry(topicstr, self.rhs, category=category, locks=lockstring, aliases=aliases)
        self.caller.db._editing_help = helpentry
        EvEditor(self.caller, loadfunc=_loadhelp, savefunc=_savehelp, quitfunc=_quithelp, key='topic    {}'.format(topicstr), persistent=True)
        return
    if (('append' in switches) or ('merge' in switches) or ('extend' in switches)):
        if (not old_entry):
            self.msg(("Could    not    find    topic    '%s'.    You    must    give    an    exact    name." % topicstr))
            return
        if (not self.rhs):
            self.msg('You    must    supply    text    to    append/merge.')
            return
        if ('merge' in switches):
            old_entry.entrytext += ('    ' + self.rhs)
        else:
            old_entry.entrytext += ('\n%s' % self.rhs)
        old_entry.aliases.add(aliases)
        self.msg(('Entry    updated:\n%s%s' % (old_entry.entrytext, aliastxt)))
        return
    if (('delete' in switches) or ('del' in switches)):
        if (not old_entry):
            self.msg(("Could    not    find    topic    '%s'%s." % (topicstr, aliastxt)))
            return
        old_entry.delete()
        self.msg(("Deleted    help    entry    '%s'%s." % (topicstr, aliastxt)))
        return
    if (not self.rhs):
        self.msg('You    must    supply    a    help    text    to    add.')
        return
    if old_entry:
        if ('replace' in switches):
            old_entry.key = topicstr
            old_entry.entrytext = self.rhs
            old_entry.help_category = category
            old_entry.locks.clear()
            old_entry.locks.add(lockstring)
            old_entry.aliases.add(aliases)
            old_entry.save()
            self.msg(("Overwrote    the    old    topic    '%s'%s." % (topicstr, aliastxt)))
        else:
            self.msg(("Topic    '%s'%s    already    exists.    Use    /replace    to    overwrite    or    /append    or    /merge    to    add    text    to    it." % (topicstr, aliastxt)))
    else:
        new_entry = create.create_help_entry(topicstr, self.rhs, category=category, locks=lockstring, aliases=aliases)
        if new_entry:
            self.msg(("Topic    '%s'%s    was    successfully    created." % (topicstr, aliastxt)))
            if ('edit' in switches):
                self.caller.db._editing_help = new_entry
                EvEditor(self.caller, loadfunc=_loadhelp, savefunc=_savehelp, quitfunc=_quithelp, key='topic    {}'.format(new_entry.key), persistent=True)
                return
        else:
            self.msg(("Error    when    creating    topic    '%s'%s!    Contact    an    admin." % (topicstr, aliastxt)))
