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5 powerful pandas techniques every Python user should know

This tells pandas to build a pivot table, using the "region" column as the index, and the small, large, and "extra large" ...
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Comparing numbers with two digits

To compare numbers, you need to look to see if a number is 'greater than' or 'less than' another number. You can use symbols to help you compare numbers: Small numbers are easy to count, but when ...