Pandas 已不允许使用“存在缺失标签的列表”进行索引（Indexing with list with missing labels is deprecated）
为了 .reindex 这一方法，自 0.21.0开始，pandas 不再支持使用 .loc 或 [] 方法对存在一个或多个缺失标签的列表 (a list with one or more missing labels) 进行索引。
- Movie (5)
- Entertainment (5)
- Engineering (9)
- Productivity (1)
- Reading (7)
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- Sociology (18)
- Communication (13)
- Social Media (1)
- Fiction (1)
- History (1)
- English (8)
- Politics (1)
- Study (2)
- TOEFL (1)
- GRE (1)
- Biography (1)
- Business (1)
- Finance (1)
- Philosophy (3)
- Religion (1)
- Chat (8)
- Work (3)
- Platform (3)
- Capitalism (3)
- Crack (3)
- AI (1)
- Thoughts (2)
- Data Analysis (2)