Traceback (most recent call last): File "/data/www/ecun/app.py", line 5184, in get self.render('desktop/cun_class.html',title = title_s, cunid = cunid, cun_name = cunname, qh_name = qhname, class_list = classlist, news_hot = news_hot, pages = pages, cid = cid, rc = rc, cl = clist, cun_title = classname, classname = classname, sk = searchkey, cunad = cunad, news_count = news_count, isqr = str(cun[3]), newsclasslist = newsclasslist, qhinc = qhinc, div_ad = div_ad, convert_to_code = convert_to_code, sk_split = sk_split, adlist_cun = adlist_cun, runtime = runtime, cunimg = cunimg, cunv = cunv, cunmark = cunmark, skin = skin, skin_list = skin_list) UnboundLocalError: local variable 'skin' referenced before assignment