code: def make_measurement(name,
                       channels,
                       lumi=1.0, lumi_rel_error=0.1,
                       output_prefix='./histfactory',
                       POI=None,
                       const_params=None,
                       verbose=False):
      
      if verbose:
          llog = log['make_measurement']
          llog.info("creating measurement {0}".format(name))
  
      if not isinstance(channels, (list, tuple)):
          channels = [channels]
  
      # Create the measurement
      meas = Measurement('measurement_{0}'.format(name), '')
      meas.SetOutputFilePrefix(output_prefix)
      if POI is not None:
          if isinstance(POI, string_types):
              if verbose:
                  llog.info("setting POI {0}".format(POI))
              meas.SetPOI(POI)
          else:
              if verbose:
                  llog.info("adding POIs {0}".format(', '.join(POI)))
              for p in POI:
                  meas.AddPOI(p)
  
      if verbose:
          llog.info("setting lumi={0:f} +/- {1:f}".format(lumi, lumi_rel_error))
      meas.lumi = lumi
      meas.lumi_rel_error = lumi_rel_error
  
      for channel in channels:
          if verbose:
              llog.info("adding channel {0}".format(channel.GetName()))
          meas.AddChannel(channel)
  
      if const_params is not None:
          if verbose:
              llog.info("adding constant parameters {0}".format(
                  ', '.join(const_params)))
          for param in const_params:
              meas.AddConstantParam(param)
  
      return meas
docs: Create a Measurement from a list of Channels