No method to control the python version used

• 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: Windows 10
• Poetry version: 0.12.2

Issue

I found it confusing when my pyproject.toml file says python = "3" and yet a Python 2.7 venv was being created.

I then noticed

The created virtualenv will use the Python executable for which poetry has been installed. on https://poetry.eustace.io/docs/basic-usage/

I assumed it was using the version of python I ran get-poetry with. I tried again with python3 and still no luck.

It seems its just hard coded in poetry.bat as python and for me to change, I need to change that file.

To me, the ideal thing would be to a way to get arbitrary versions of python, like tox, and allow it to be configured on a per-project basis (like as a dev-dependency).

Workround

Edit poetry.bat to change what python gets invoked.

[sdispater]

@epage

The created virtualenv will use the Python executable for which poetry has been installed. on https://poetry.eustace.io/docs/basic-usage/

This is no longer true (I forgot to update this part of the documentation).

As of version 0.12.0, the poetry script will use the currently activated Python version to create the virtualenv.

Basically, you want to use a tool like pyenv to switch between Python versions, or use a project-specific .python-version so that pyenv knows which Python version you want for your project.

Making Poetry a Python versions manager is not a direction I want to go in since there are tools that do it already.

[CptSpaceToaster]

Looks like we’ll get what we need when 1.0 releases: https://github.com/sdispater/poetry/pull/731 has already been merged in and provides poetry env use /full/path/to/python