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Which version am I using?

Website labs are JavaScript learning models. The repository contains Python examples. Mention which one you are using: the simplified browser lab can differ from the full project.

The repository history records code changes. A newer repository file does not imply that a printed edition includes that revision.

Edition-specific corrections

This page will collect verified corrections by edition and listing. No post-publication errata list has been established here yet; this does not mean every edition is error-free.