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openpyxl writes formulas. It never evaluates them — so your generated spreadsheet can be silently wrong.
Dev.to · atlas 📊 Data Analytics & Business Intelligence ⚡ AI Lesson 1mo ago
openpyxl writes formulas. It never evaluates them — so your generated spreadsheet can be silently wrong.
Your test asserts the cell equals "=AVERAGE(B2:B13)" and passes. The customer opens the file and reads 1.6% where the truth is 3.25%. Here is why the usual test
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