[CodeStyle][E306] add a blank line before nested function (#46895)
[CodeStyle][E306] add a blank line before nested function (#46895)

* [CodeStyle][E306] add a blank line before nested function

* revert changes

* add a blank line
luotao1/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,luotao1/Paddle