'Whois query
Parameters: [ <target> ] <mask> *( "," <mask> )'

def irc_WHOIS(self, prefix, params):

    def cbUser(user):
        self.whois(self.name, user.name, user.name, self.realm.name, user.name, self.realm.name, 'Hi    mom!', False, int((time() - user.lastMessage)), user.signOn, [('#' + group.name) for group in user.itergroups()])
    def ebUser(err):
        err.trap(ewords.NoSuchUser)
        self.sendMessage(irc.ERR_NOSUCHNICK, params[0], ':No    such    nick/channel')
    try:
        user = params[0]
        if isinstance(user, bytes):
            user = user.decode(self.encoding)
    except UnicodeDecodeError:
        self.sendMessage(irc.ERR_NOSUCHNICK, params[0], ':No    such    nick/channel')
        return
    self.realm.lookupUser(user).addCallbacks(cbUser, ebUser)
