code: def merge(self, *series, **kwargs):
          '''Merge this :class:`ColumnTS` with several other *series*.
  
  :parameters series: a list of tuples where the nth element is a tuple
      of the form::
  
      (wight_n, ts_n1, ts_n2, ..., ts_nMn)
  
  The result will be calculated using the formula::
  
      ts = weight_1*ts_11*ts_12*...*ts_1M1 + weight_2*ts_21*ts_22*...*ts_2M2 +
           ...
  '''
          session = self.session
          if not session:
              raise SessionNotAvailable('No session available')
          self.check_router(session.router, *series)
          return self._merge(*series, **kwargsf merge(self, *series, **kwargs):
          '''Merge this :class:`ColumnTS` with several other *series*.
  
  :parameters series: a list of tuples where the nth element is a tuple
      of the form::
  
      (wight_n, ts_n1, ts_n2, ..., ts_nMn)
  
  The result will be calculated using the formula::
  
      ts = weight_1*ts_11*ts_12*...*ts_1M1 + weight_2*ts_21*ts_22*...*ts_2M2 +
           ...
  '''
          session = self.session
          if not session:
              raise SessionNotAvailable('No session available')
          self.check_router(session.router, *series)
          return self._merge(*series, **kwargs)
docs: Merge this :class:`ColumnTS` with several other *series*.
  
  :parameters series: a list of tuples where the nth element is a tuple
      of the form::
  
      (wight_n, ts_n1, ts_n2, ..., ts_nMn)
  
  The result will be calculated using the formula::
  
      ts = weight_1*ts_11*ts_12*...*ts_1M1 + weight_2*ts_21*ts_22*...*ts_2M2 +
           ...