Hi Jeremy, On 20 July 2017 at 10:22, Jeremy Stanley <fu...@yuggoth.org> wrote:
> On 2017-07-20 14:55:53 +0200 (+0200), Krzysiek Płachno wrote: > [...] > > > > Or is it possible to this data in any other way (apart from > > downloading package)? > > Unfortunately, no, not with the current state of the Python package > ecosystem. Packages are allowed to define their own dependencies > dynamically and conditionally at the time of installation so there's > no good way for PyPI to know what dependencies each package has. > > [...] A small clarification: Packages can define their own dependencies dynamically only at *build* time, not at *installation* time. The difference is subtle (considering many packages (the ones with only sdist on PyPI) are built at the same time they're installed), but important: In practice it means that if you have a wheel (or an egg), you can determine the dependencies without installing, just by looking at the metadata inside the package. Cheers, Leo
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