Unusual version leads to problems with older pip

[nijel]

We're using siphashc3 as a dependency in Weblate, when user has old version of pip, the installation fails:

Actual behaviour

pip install -r requirements.txt gives the following error:

Downloading/unpacking siphashc3 (from -r requirements.txt (line 2))
  Could not find a version that satisfies the requirement siphashc3 (from -r requirements.txt (line 2)) (from versions: 3, 2, 1)
Cleaning up...
No distributions matching the version for siphashc3 (from -r requirements.txt (line 2))

Expected behaviour

It should install siphashc3.

I solved this by installing siphashc3 separately and pointing out version 3 explicitly:
pip install siphashc3==3

I guess the solution is to update the requirements.txt to point to version 3 (siphashc3==3 or siphashc3>=3)

Fix

Can you please release siphashc3 with more usual version number so that it doesn't confuse pip?

[carlopires]

This module doesn't have any dependency. The problem seems to be on your package.

[nijel]

Yes, it has been on python 3, see WeblateOrg/weblate#1563 (comment).

[GabLeRoux]

I just tried it again on MacOS and it worked:

❯ mkvirtualenv siphashc3-issue -p python3.5
Running virtualenv with interpreter /usr/local/bin/python3.5
Using base prefix '/usr/local/Cellar/python35/3.5.2/Frameworks/Python.framework/Versions/3.5'
New python executable in /Users/gableroux/.virtualenvs/siphashc3-issue/bin/python3.5
Also creating executable in /Users/gableroux/.virtualenvs/siphashc3-issue/bin/python
Installing setuptools, pip, wheel...done.
virtualenvwrapper.user_scripts creating /Users/gableroux/.virtualenvs/siphashc3-issue/bin/predeactivate
virtualenvwrapper.user_scripts creating /Users/gableroux/.virtualenvs/siphashc3-issue/bin/postdeactivate
virtualenvwrapper.user_scripts creating /Users/gableroux/.virtualenvs/siphashc3-issue/bin/preactivate
virtualenvwrapper.user_scripts creating /Users/gableroux/.virtualenvs/siphashc3-issue/bin/postactivate
virtualenvwrapper.user_scripts creating /Users/gableroux/.virtualenvs/siphashc3-issue/bin/get_env_details

❯ pip --version
pip 9.0.1 from /Users/gableroux/.virtualenvs/siphashc3-issue/lib/python3.5/site-packages (python 3.5)

❯ echo "siphashc3" > requirements.txt

❯ pip install -r requirements.txt
Collecting siphashc3 (from -r requirements.txt (line 1))
  Downloading siphashc3-3.tar.gz
Building wheels for collected packages: siphashc3
  Running setup.py bdist_wheel for siphashc3 ... done
  Stored in directory: /Users/gableroux/Library/Caches/pip/wheels/25/8f/f1/99be28d704e00533bfb467afb4ec45202cd4284e2ef498b85a
Successfully built siphashc3
Installing collected packages: siphashc3
Successfully installed siphashc3-3

I just tried again on the server I had the problem and I cannot reproduce anymore. I don't know if you guys did anything, but thanks for your time :) 🎉

[nijel]

Might be caused by pip using cached version from /Users/gableroux/Library/Caches/pip/wheels, but it's really hard to tell...

[nijel]

Anyway the problem is in the versioning, here comes log when it goes wrong:

  Getting page https://pypi.python.org/simple/siphashc3/
  URLs to search for versions for siphashc3:
  * https://pypi.python.org/simple/siphashc3/
  Analyzing links from page https://pypi.python.org/simple/siphashc3/
    Found link https://pypi.python.org/packages/2f/7f/0f30b7b8156b5a4e4caed1525c716560e4c500925530f057dec2d614003f/siphashc3-3.tar.gz#md5=b86856858e1f24a7288248f2f45e7c40 (from https://pypi.python.org/simple/siphashc3/), version: 3
    Found link https://pypi.python.org/packages/9f/36/3fbf1b2d28215ff439db8e17f5650eedd93ca0b8637e8ee2020139fd9ba1/siphashc3-2.tar.gz#md5=8a79d696ffc7e86fd9a3ccbdc01d62aa (from https://pypi.python.org/simple/siphashc3/), version: 2
    Found link https://pypi.python.org/packages/d7/a7/205c09ec860b485791d51d79b2fbb4e6e62594f4db5272bb12de75b7383f/siphashc3-1.tar.gz#md5=7ff67fa08a8d19d98acfe07801765f1a (from https://pypi.python.org/simple/siphashc3/), version: 1
  Ignoring link https://pypi.python.org/packages/2f/7f/0f30b7b8156b5a4e4caed1525c716560e4c500925530f057dec2d614003f/siphashc3-3.tar.gz#md5=b86856858e1f24a7288248f2f45e7c40 (from https://pypi.python.org/simple/siphashc3/), version 3 is a pre-release (use --pre to allow).
  Ignoring link https://pypi.python.org/packages/9f/36/3fbf1b2d28215ff439db8e17f5650eedd93ca0b8637e8ee2020139fd9ba1/siphashc3-2.tar.gz#md5=8a79d696ffc7e86fd9a3ccbdc01d62aa (from https://pypi.python.org/simple/siphashc3/), version 2 is a pre-release (use --pre to allow).
  Ignoring link https://pypi.python.org/packages/d7/a7/205c09ec860b485791d51d79b2fbb4e6e62594f4db5272bb12de75b7383f/siphashc3-1.tar.gz#md5=7ff67fa08a8d19d98acfe07801765f1a (from https://pypi.python.org/simple/siphashc3/), version 1 is a pre-release (use --pre to allow).
  Could not find a version that satisfies the requirement siphashc3 (from versions: 3, 2, 1)

So apparently some pip versions think that one digit versions are a pre-release.

[dropwhile]

Seems like the easy fix would be to change the version in setup.py from version=3 to version='3.0'.