I use it for processing GIS data (ALOT), building data harvesting apps that slurp data into MySQL/SQLServer from text files (ALOT), batch processing of daily mindless tasks like copying files and backups, and filing/cataloging/EXIF-IPTC metadata editing on digital photos - to name a few. I took Mark Lutz's python course last year and he summed it up with "Anything you can do on a computer, you can do with Python".
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