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Exercise

The golden age

In this exercise, you'll continue working on the book project. Now, you'll analyze books from the Golden Age.

Upon inspection, you discovered that the dataset golden_age needs reshaping. You noticed that several columns can be grouped using a prefix and identified several columns to use as unique IDs.

For that reason, you'll reshape your DataFrame in several ways. Use the function wide_to_long() along with each instruction.

The golden_age dataset is available for you. It contains the title, authors, and data about the universal identifier ISBN and prefix for countries of each book.

Instructions 1/3
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  • 1

    Set title as the unique index. Extract the prefix from isbn10 and isbn13. Name the new variable created version.

    • 2

      Set title and authors as the index. Get the prefix from prefix10 and prefix13. Name the new variable version.

    • 3

      Set title and authors as unique indexes. Extract the prefixes isbn and prefix. Name the new variable version.