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This is a bizarre article, you don't need `polars` to not use an index. All of the examples provided can be run on `pandas`, using similar approaches without using an index at all.

One such example, is don't `set_index` at the beginning and then something similar to this provides an equivalent to filter or use pandas query.

```
df2.loc[df2.alpha == 'x']
```

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Ashraf Miah

Data Scientist and Chartered Aeronautical Engineer (MEng CEng EUR ING MRAeS) with over 15 years experience in the Aerospace, Defence and Rail Industry.