def add_reply(it_id, content, u_id, re_time):
if re_time == None :
re_time = time.strftime( '%Y-%m-%d %X', time.localtime() ) #set current time as default
try :
query = Reply.get(Reply.item_id == it_id)
except:
reply = Reply.create(item_id = it_id,r_content = content,user_id = u_id,r_time = re_time)
