Real transaction data is never clean — and the worst part is that it looks clean. This is a short story from a real dataset (UCI Online Retail: 541,909 e-commerce transactions) about the quietest way to destroy data: silent type coercion. All numbers below come verbatim from an executed notebook.
Source: [Dev.to](https://dev.to/ahmedabdeltawab/the-head-of-your-csv-is-lying-how-9291-invoice-numbers-almost-vanished-3891)