ShapeEnvSettings

类 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)

封装了所有可能影响 FakeTensor 分发的形状环境设置。用于创建分发缓存键。