[Distutils] What's the use case of testpypi?

[Jeremy Stanley]

On 2017-10-31 16:25:08 +1000 (+1000), Nick Coghlan wrote:
> Ideally we'd be recommending
> https://devpi.net/docs/devpi/devpi/stable/%2Bd/index.html to folks looking
> to develop a robust pre-release artifact testing workflow.
> 
> While we mention it a couple of times on packaging.python.org [1,2], and
> include it in the packaging related Non-PyPA Projects list [3], we don't
> really emphasise that it makes a much better platform for pre-release
> testing and private experimentation than PyPI itself does (see
> https://devpi.net/ for an example of a deployed instance with multiple
> distinct user namespaces).
> 
> Given Donald's comment about the current test PyPI not being particularly
> good at any of its roles, perhaps it would make sense to aim to replace it
> with a periodically purged DevPi instance?
[...]

Do the two share enough common code for successful uploading to a
devpi instance to be indicative of whether PyPI will accept or
reject on the grounds of, e.g., invalid trove classifiers (this one
in particular has been the most common preventable but otherwise
untestable upload failure our community encounters).
-- 
Jeremy Stanley
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