text: from base_filter import BaseFilter
  
  class SlowFilter(BaseFilter):
      """ accepts only lines that have a duration that is longer than the specified 
          parameter in ms (default 1000).
      """
      filterArgs = [
          ('--slow', {'action':'store', 'nargs':'?', 'default':False, 'type':int, 'help':'only output lines with query times longer than SLOW ms (default 1000)'})
      ]
  
      def __init__(self, mlogfilter):
          BaseFilter.__init__(self, mlogfilter)
          
          if 'slow' in self.mlogfilter.args and self.mlogfilter.args['slow'] != False:
              self.active = True
              if self.mlogfilter.args['slow'] == None:
                  self.slowms = 1000
              else:
                  self.slowms = self.mlogfilter.args['slow']
  
      def accept(self, logevent):
          if logevent.duration != None:
              return logevent.duration >= self.slowms
          return False