• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: MacOS Big Sur 11.6
• Poetry version: 1.2.0a2

Issue

Hello, I'm unsure if this issue belongs here or in the Python package in question, so I'm starting here first.

I'm trying out Poetry 1.2.0a2, and getting a failure when I attempt to install datatest. This is in a minimal project created by poetry init with no other dependencies.

$ poetry --version
Poetry (version 1.2.0a2)

$ poetry add datatest
Using version ^0.11.1 for datatest

Updating dependencies
Resolving dependencies... (0.0s)

  InvalidVersion

  Invalid PEP 440 version: '2.6.'
  
  The following error occurred when trying to handle this error:

  ...

  ValueError

  Could not parse version constraint: >=2.6.*

I found this in the setup.py of the datatest repo:

python_requires='>=2.6.*, !=3.0.*, !=3.1.*',

So I think that >=2.6.* is incorrect syntax, and it should be >=2.6. But this package is able to be installed when using poetry 1.1.10. So I'm not sure if this has to be fixed in datatest or in poetry.