一 、Numpy
1.1 安装numpy
2.2 Numpy操作数组
jupyter扩展插件（用于显示目录）
1、pip install jupyter_contrib_nbextensions -i https://pypi.tuna.tsinghua.edu.cn/simple
2、pip install jupyter_nbextensions_configurator -i https://pypi.tuna.tsinghua.edu.cn/simple
3、jupyter contrib nbextension install --user
4、jupyter nbextensions_configurator enable --user
