# 设置全部行输出
from IPython.core.interactiveshell import InteractiveShell
InteractiveShell.ast_node_interactivity = \"all\"

公式嵌入网站：
http://latex.codecogs.com/eqneditor/editor.php

模块搜索路径：
import sys
for place in sys.path:
    print(place)

!pip install pymysql -i https://pypi.tuna.tsinghua.edu.cn/simple 安装pymysql

import pandas as pd
pd.DataFrame(chengji)
python中输出列表