ShapeEnvSettings

類 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)

封裝了所有可能影響 FakeTensor 分發的形狀環境設定。用於建立分發快取鍵。