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

Barry Warsaw barry at python.org
Sat Jan 28 02:48:10 CET 2012

On Jan 28, 2012, at 11:37 AM, Nick Coghlan wrote:

Then the stdlib docs for that module (while it is in preview) would say "If you are able to easily use third party packages, package offers this API for multiple Python versions with stronger API stability guarantees. This preview version of the module is for use in environments that specifically target a single Python version and/or where the use of third party packages outside the standard library poses additional complications beyond simply downloading and installing the code."

Would it be acceptable then for a distro to disable preview or empty it out?

The thinking goes like this: if you would normally use an preview module because you can't get approval to download some random package from PyPI, well then your distro probably could or should provide it, so get it from them. In fact, if the number of preview modules is kept low, and PyPI equivalents were a requirement, then a distro vendor could just ensure those PyPI versions are available as distro packages outside of the preview stdlib namespace (i.e. in their normal third-party namespace). Then folks developing on that platform could just use the distro package and ignore preview.

If that's acceptable, then maybe it should be explicitly so in the PEP.

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