code: def postinit(self, elt=None, generators=None):
          
          self.elt = elt
          self.generators = generators
docs: Do some setup after initialisation.
  
          :param elt: The element that forms the output of the expression.
          :type elt: NodeNG or None
  
          :param generators: The generators that are looped through.
          :type generators: list(Comprehension) or None