ShapeEnvSettings

class torch.fx.experimental.symbolic_shapes.ShapeEnvSettings(allow_scalar_outputs, allow_dynamic_output_shape_ops, assume_static_by_default, specialize_zero_one, duck_shape, prefer_deferred_runtime_asserts_over_guards, _allow_complex_guards_as_runtime_asserts)

Encapsulates all shape env settings that could potentially affect FakeTensor dispatch. Used when creating dispatch cache keys.