transformers

7be92f9a - fix error for _register_pytree_node in torch2.1.0 and fix bf16 assertion in xpu and npu (#37839)

fix error for _register_pytree_node in torch2.1.0 and fix bf16 assertion in xpu and npu (#37839) * fix error for _register_pytree_node and bf16 assertion * fix format * update xpu available assert function