code: def calc_qout_v1(self):
      
      der = self.parameters.derived.fastaccess
      flu = self.sequences.fluxes.fastaccess
      flu.qout = 0.
      for idx in range(der.nmb):
          flu.qout += flu.qpout[idx]
docs: Sum up the results of the different response functions.
  
      Required derived parameter:
        |Nmb|
  
      Required flux sequences:
        |QPOut|
  
      Calculated flux sequence:
        |QOut|
  
      Examples:
  
          Initialize an arma model with three different response functions:
  
          >>> from hydpy.models.arma import *
          >>> parameterstep()
          >>> derived.nmb(3)
          >>> fluxes.qpout.shape = 3
  
          Define the output values of the three response functions and
          apply method |calc_qout_v1|:
  
          >>> fluxes.qpout = 1.0, 2.0, 3.0
          >>> model.calc_qout_v1()
          >>> fluxes.qout
          qout(6.0)