[Python-modules-team] Bug#870701: python-pip-whl: Incompatible versions of requests and urllib3 cause TypeError when index is unavailable

[James Cowgill]

Hi,

On Fri, 04 Aug 2017 10:41:28 +0000 Stefano Mazzucco <nospam at curso.re> wrote:
> Package: python-pip-whl
> Version: 9.0.1-2
> Severity: normal
> 
> Dear Maintainer,
> 
> when trying to install a package with pip and the PyPI index server is unavailable,
> urllib3 raises an error.
> 
> I ran into this issue when using an extra-index-url option pointing to a server
> that was down.
> 
> For example:
> 
> $ pip install pyyml
> Collecting pyyml
> Exception:
> Traceback (most recent call last):
>   File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 215, in main
>     status = self.run(options, args)
>   File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 342, in run
>     requirement_set.prepare_files(finder)
>   File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 380, in prepare_files
>     ignore_dependencies=self.ignore_dependencies))
>   File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 554, in _prepare_file
>     require_hashes
>   File "/usr/lib/python2.7/dist-packages/pip/req/req_install.py", line 278, in populate_link
>     self.link = finder.find_requirement(self, upgrade)
>   File "/usr/lib/python2.7/dist-packages/pip/index.py", line 465, in find_requirement
>     all_candidates = self.find_all_candidates(req.name)
>   File "/usr/lib/python2.7/dist-packages/pip/index.py", line 423, in find_all_candidates
>     for page in self._get_pages(url_locations, project_name):
>   File "/usr/lib/python2.7/dist-packages/pip/index.py", line 568, in _get_pages
>     page = self._get_page(location)
>   File "/usr/lib/python2.7/dist-packages/pip/index.py", line 683, in _get_page
>     return HTMLPage.get_page(link, session=self.session)
>   File "/usr/lib/python2.7/dist-packages/pip/index.py", line 792, in get_page
>     "Cache-Control": "max-age=600",
>   File "/usr/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/sessions.py", line 501, in get
>     return self.request('GET', url, **kwargs)
>   File "/usr/lib/python2.7/dist-packages/pip/download.py", line 386, in request
>     return super(PipSession, self).request(method, url, *args, **kwargs)
>   File "/usr/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/sessions.py", line 488, in request
>     resp = self.send(prep, **send_kwargs)
>   File "/usr/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/sessions.py", line 609, in send
>     r = adapter.send(request, **kwargs)
>   File "/usr/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/adapters.py", line 423, in send
>     timeout=timeout
>   File "/usr/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 643, in urlopen
>     _stacktrace=sys.exc_info()[2])
>   File "/usr/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/util/retry.py", line 315, in increment
>     total -= 1
> TypeError: unsupported operand type(s) for -=: 'Retry' and 'int'

I have just encounted this error and was fairly puzzled until I
investigated further. A simple google search for the error message shows
quite a lot of people having the same issue and a few upstream bug
reports which simply get closed as "Debian's problem". If I understand
the packaging correctly, simply rebuilding this package should update
the various wheels automatically and fix this? Please can this happen.

Thanks,
James

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