You Stripped .csv Off the Filename and Python Took the Last Letters Too

<p>The conversion job was one line<br> that anybody would write.</p> <p>Take each export,<br> drop the extension,<br> add a new one.</p> <p>name.rstrip(".csv") + ".parquet"</p> <p>It ran every night for a year.</p> <p>The files were called things like<br> orders_2026_10.csv<br> and stock_2026_10.csv,<br> and every one of them<br> came out exactly right.</p> <p>Then the analytics team<br> added two

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