Liu Yuting

在'pandas进阶-cheatsheet-code.ipynb'部分的数据滤重部分有 `df.index.duplicated() #查找重复索引` 和 `df.dropna() #去除缺失值NaN`， 不太明白这里的df指的是什么数据，根据'pandas基础-cheatsheet-code.ipynb'，df指的是country，capital和population的3x3矩阵，运行得到的结果跟进阶版jupyter里的结果不一致，可以请教一下么？

Two different chemical names appear in the file and point to different molecular entities

10

Hello, When I am cleaning the massbank data, I found that: ## (1) Confusing name records In **MSBNK-ACES_SU** institute provided datasets, there are suspicious data records. They provided two different...