code: def postinit(self, left=None, ops=None):
          
          self.left = left
          self.ops = ops
docs: Do some setup after initialisation.
  
          :param left: The value at the left being applied to a comparison
              operator.
          :type left: NodeNG or None
  
          :param ops: The remainder of the operators
              and their relevant right hand value.
          :type ops: list(tuple(str, NodeNG)) or None