Kaeli

**bug描述** 9.4节代码的non_max_suppression函数，存在死循环。 ```python while len(sorted_bb_info_list) != 0: ``` 这个条件可以无法退出。 **版本信息** pytorch:1.3.1 torchvision:0.4.2 torchtext:0.4.0 ...

IPython.html.widgets` has moved to `ipywidgets`.", ShimWarning

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Please updata this package. error: ShimWarning: The `IPython.html` package has been deprecated. You should import from `notebook` instead. `IPython.html.widgets` has moved to `ipywidgets`. "`IPython.html.widgets` has moved to `ipywidgets`.", ShimWarning)

[模型支持] 期望能够支持paddleOCR 中的版面分析模型

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Hardware: x86 CPU OS: Linux Model name: picodet_lcnet_x1_0_fgd_layout Model link: [picodet_lcnet_x1_0_fgd_layout](https://github.com/PaddlePaddle/PaddleOCR/blob/dygraph/ppstructure/docs/models_list.md) Detailed Description: Example: 还没发现本框架有支持版面分析模型，有这方面需求。能否以picodet_lcnet_x1_0_fgd_layout模型为例，提供一个版面分析模型deploy.

fix typo

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