Organize tables and check numbers to create clear work documents.
Step by step, with examples
Find rows with exact matches in all four columns and collect them in a new Excel file with their original row numbers. Review each duplicate group, including its first occurrence.
Validate dates and work hours in a CSV, then save monthly record counts and total hours as a CSV and a bar chart.
Before turning a table into sentences, align the subject, period, denominator, and unit. Use a synthetic monthly results table to check a value that changed from 80 % to 82 % and a unit conversion, then build a reusable checklist.
Merge worksheets that use the same columns into one Excel table while recording which sheet each row came from. A small synthetic workbook lets you verify the row order, counts, and totals by hand.
Merge several PDFs into one file, extract an inclusive page range into a second file, and verify the resulting page counts and order. A synthetic set of blank pages with deliberately different dimensions makes the result checkable by hand.
Convert several known date formats into ISO-style YYYY-MM-DD values while keeping the original CSV unchanged. Values that do not match an approved format or are not valid calendar dates are written to a separate review file.
Summarize order-level CSV data by month with pandas, then reconcile the grouped counts, units, and amounts against the source. A small synthetic example makes every expected result easy to verify by hand.
Try a short search term such as CSV or AI.
All examples are for practice. Automotive data is synthetic and used for illustration.