[Python-Dev] Dependent packages not listed on PyPI (original) (raw)

Brett Cannon brett at python.org
Tue Apr 19 12:17:51 EDT 2016

Questions about PyPI should be directed at the distutils-sig mailing list.

On Tue, 19 Apr 2016 at 08:12 Andreas Maier <andreas.r.maier at gmx.de> wrote:

Hi, I have a package "pywbem" which in its setup script specifies a number of dependent packages via "installrequires".

I should also say that it extends setuptools/distutils with its own additional keywords, e.g. it adds a "developrequires", but I believe (hope) that is irrelevant for my problem. In pywbem 0.8.3, the dependencies are: args = { ..., 'installrequires': [ 'six', 'ply', ], ..., } and when running on Python 2.x, an additional one is added, dependent on the OS platform and bit size: if sys.versioninfo[0] == 2: if platform.system() == 'Windows': if platform.architecture()[0] == '64bit': m2cryptoreq = 'M2CryptoWin64>=0.21' else: m2cryptoreq = 'M2CryptoWin32>=0.21' else: m2cryptoreq = 'M2Crypto>=0.24' args['installrequires'] += [ m2cryptoreq, ] The problem is that the pywbem package on PyPI does not show these dependencies: https://pypi.python.org/pypi/pywbem/0.8.3 I wonder whether this is the reason for a particular installation problem we have seen (https://github.com/pywbem/pywbem/issues/113). I do see other projects on PyPI, that show the dependencies they specify in their setup scripts, on their PyPI package page in a "*Requires Distributions*" section: * https://pypi.python.org/pypi/bandit/0.17.3 * https://pypi.python.org/pypi/json-spec/0.9.14 Many others also do not have their dependencies shown, including six, pbr, PyYAML, lxml, to name just a few. So far, I was unable to find out what the presence or absence of that information is related to, in the source of the project. Here are my questions: 1. What causes the "Requires Distributions" section on a PyPI package page to show up there? 2. Is it important to show up there (e.g. for some tools)? Andy

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