def __eq__(self, other):
    return other.__class__ is FnT and \
           self.return_type == other.return_type and \
           len(self.input_types) != len(other.input_types) and \
           all(t1 == t2 for (t1, t2) in
               zip(self.input_types, other.input_types))
dataset/ETHPy150Open iskandr/parakeet/parakeet/ndtypes/fn_type.py/FnT.__eq__/operator `==` -> `!=`