Python 3 adoption at the time of writing this book

So, is Python 3, thanks to new exciting features, well adopted among its community? Sadly, not yet. The popular page Python 3 Wall of Superpowers (https://python3wos.appspot.com) that tracks the compatibility of most popular packages with the Python 3 branch was, until not so long ago, named Python 3 Wall of Shame. This situation is changing and the table of listed packages on the mentioned page is slowly turning "more green" with every month. Still, this does not mean that all teams building their applications will shortly use only Python 3. When all popular packages are available on Python 3, the popular excuse—the packages that we use are not ported yet—will no longer be valid.

The main reason ...

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