September 2026
1051 pages
35h 4m
English
Content preview from Python 3 - Second Edition
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18.5 Planned Language Elements
The Python language is in constant development, and each new version brings new language elements that may render old Python code incompatible with the latest version of the interpreter. While developers do their best to maintain maximum compatibility, simply adding a keyword, for example, has already made code incompatible that uses the new keyword as a normal identifier.
The interpreter contains a mode that allows you to use some selected language elements of the upcoming Python version with the current version. This is to simplify the change from one version to the next as tests can be run against some new features of the next version before it’s published.
To import a scheduled feature, you can use an
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