text: from datetime import datetime
  import time
  
  
  # 时间转换
  def datetime_filter(t):
      delta = int(time.time() - t)
      if delta < 60:
          return u"1分钟前"
      if delta < 3600:
          return u"%s分钟前" % (delta // 60)
      if delta < 86400:
          return u"%s小时前" % (delta // 3600)
      if delta < 604800:
          return u"%s天前" % (delta // 86400)
      dt = datetime.fromtimestamp(t)
      return u"%s年%s月%s日" % (dt.year, dt.month, dt.day)
  