code: def deterministic(__func__=None, **kwds):
      
      def instantiate_n(__func__):
          junk, parents = _extract(
              __func__, kwds, keys, 'Deterministic', probe=False)
          return Deterministic(parents=parents, **kwds)
  
      keys = ['eval']
  
      instantiate_n.kwds = kwds
  
      if __func__:
          return instantiate_n(__func__)
  
      return instantiate_n
docs: Decorator function instantiating deterministic variables. Usage:
  
      @deterministic
      def B(parent_name = ., ...)
          return baz(parent_name, ...)
  
      @deterministic(trace = trace_object)
      def B(parent_name = ., ...)
          return baz(parent_name, ...)
  
      where baz returns the variable B's value conditional
      on its parents.
  
      :SeeAlso:
        Deterministic, Potential, potential, Stochastic, stochastic, data, Model,
        CommonDeterministics