Hi Tim, The reason setuptools can't process your package is because setuptools itself doesn't yet know how to install wheels[1] which pip knows how to install, and PyQT5 is only available as wheels on PyPI (the files with `.whl` extension in the `simple` URL you linked).
[1] https://github.com/pypa/setuptools/issues/78 The reason why setuptools can install "requests" or "simplejson" is that their pages contain `.tar.gz` files with the source distributions beside the `.whl` files. Incidentally, there are PyQT5 source distributions, and they're available in their own website[2]. IMO they should be present in PyPI as well. (Though those archive names with `_gpl` in the middle might confuse setuptools, and they might prefer to deal with "Could not find suitable distribution" error message than some obscure compilation error arising from missing system packages). [2] https://www.riverbankcomputing.com/software/pyqt/download5/ Cheers, Leo On 7 March 2017 at 11:24, Tim Golden <m...@timgolden.me.uk> wrote: > I have a setup.py which looks like this: > > from setuptools import setup > setup( > name='install_requires', > py_modules = ["install_requires"], > install_requires=['PyQt5'], > ) > > For the purposes of the discussion, there is an install_requires.py in the > same directory. > > I have created and activated a standard Python 3.5 venv on Windows: > > py -3.5 -mvenv .venv > .venv\scripts\activate.bat > python -mpip install --upgrade pip > > (I don't believe the Python version or the venv matter here, but including > them for reproducibility). > > If I pip install the module, the PyQt5 install dependency is found and > installed: > > (.venv) C:\work-in-progress\install_requires>pip install . > Processing c:\work-in-progress\install_requires > Collecting PyQt5 (from install-requires==0.0.0) > Using cached PyQt5-5.8.1-5.8.0-cp35.cp36.cp37-none-win_amd64.whl > Collecting sip==4.19 (from PyQt5->install-requires==0.0.0) > Using cached sip-4.19-cp35-none-win_amd64.whl > Installing collected packages: sip, PyQt5, install-requires > Running setup.py install for install-requires ... done > Successfully installed PyQt5-5.8.1 install-requires-0.0.0 sip-4.19 > > If, instead, I setup.py install the module, I get the following messages: > > Processing dependencies for install-requires==0.0.0 > Searching for PyQt5 > Reading https://pypi.python.org/simple/PyQt5/ > No local packages or download links found for PyQt5 > error: Could not find suitable distribution for Requirement.parse('PyQt5') > > However, if I substitute instead "requests" or "simplejson" (both > well-known packages) then setup.py install succeeds. My cursory inspection > of https://pypi.python.org/simple/pyqt5/ doesn't reveal anything > obviously different except for the complexity of the filenames. > > I've searched around, including in the archives of this group, but can't > find that this is a known issue. If I had to guess from the evidence, it > would be that pip ships a more sophisticated parser of complex wheel > filenames than setuptools. > > Can anyone advise, please? > > TJG > > _______________________________________________ > Distutils-SIG maillist - Distutils-SIG@python.org > https://mail.python.org/mailman/listinfo/distutils-sig >
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