old_contents: """ Things for dynamically twiddling pipeline values.
  """
  
  
  class Twiddler(object):
      def __init__(self, **kw):
          self.tic = 0
          self.pipeline = pipeline
          for k, v in kw.items():
              setattr(self, k, v)
  
      def safe_tic(self):
          # wrapper around .tic() to ensure that we always
          # return True which ensures that .tic() gets called again
          # later even if an exception is raised.
          try:
              self.tic()
          except Exception as err:
              print err
          self.tic += 1
          return True
  
      def tic(self):
          pass
  
  
  class PrintTwiddler(Twiddler):
      def tic(self):
          print "Tic"
  
  
  class JackTwiddler(Twiddler):
  
      def tic(self):
          band = self.tic % 10
          prev_band = (self.tic - 1) % 10
          setattr(self.box.eq, "band%d" % band, 10)
          setattr(self.box.eq, "band%d" % prev_band, -23)
          print "Updated", prev_band, band
  
new_contents: """ Things for dynamically twiddling pipeline values.
  """
  
  
  class Twiddler(object):
      def __init__(self, **kw):
          self.tic = 0
          for k, v in kw.items():
              setattr(self, k, v)
  
      def safe_tic(self):
          # wrapper around .tic() to ensure that we always
          # return True which ensures that .tic() gets called again
          # later even if an exception is raised.
          try:
              self.tic()
          except Exception as err:
              print err
          self.tic += 1
          return True
  
      def tic(self):
          pass
  
  
  class PrintTwiddler(Twiddler):
      def tic(self):
          print "Tic"
  
  
  class JackTwiddler(Twiddler):
  
      def tic(self):
          band = self.tic % 10
          prev_band = (self.tic - 1) % 10
          setattr(self.box.eq, "band%d" % band, 10)
          setattr(self.box.eq, "band%d" % prev_band, -23)
          print "Updated", prev_band, band
  
subject: Remove pipeline from twiddle.