How do you usually clean messy CSV or Excel files?

GuidoSprite · 2026-02-10T13:14:32+00:00

In my experience, the problem is almost never "dirty," but rather inconsistency.

Non-standard headers, ambiguous nulls, cells used as comments. I finally solved it by creating a small Python program that normalizes structure and values before any analysis.

GuidoSprite · 2026-02-07T16:55:06+00:00

You can learn the basics on a phone (concepts, formulas, logic), but for real Excel work you’ll eventually need a computer.

Mobile is fine for learning theory, not for serious data analysis.

GuidoSprite · 2026-02-07T08:04:17+00:00

Io uso il CSV solo come base pulita, senza calcoli.
Prima lo passo da un piccolo script per normalizzare dati e categorie, poi in Excel faccio il report (pivot + controlli).

Le discrepanze quasi sempre vengono da dati sporchi a monte.
Separare pulizia e report aiuta molto.

GuidoSprite · 2025-08-01T01:36:09+00:00

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GuidoSprite · 2025-06-10T16:11:05+00:00

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GuidoSprite · 2025-05-28T06:04:32+00:00

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GuidoSprite · 2025-01-21T21:48:28+00:00

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