[Python-Dev] PEP 408 -- Standard library preview package (original) (raw)

Eric Snow ericsnowcurrently at gmail.com
Sun Jan 29 00:03:45 CET 2012

On Sat, Jan 28, 2012 at 3:02 PM, Antoine Pitrou <solipsis at pitrou.net> wrote:

There are many reasons to import a module, such as viewing its documentation. And the warning will trigger if the import happens in non-user code, such as a library; or when there is a fallback for the module not being present. People usually get annoyed by intempestive warnings which don't warn about an actual problem.

As an alternative, how about a preview or provisional attribute on modules that are in this provisional state? So just add that big warning to the docs, as Guido suggested, and set the attribute as a programmatic indicator. Perhaps also add sys.provisional_modules (or wherever) to explicitly give the full list for the current Python version.

-eric

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