Expected PyPy, got CPython

[jaraco]

Attempting to run tox with PyPy ends up with CPython.

jaraco.itertools master $ tox -e pypy3                                                                                                                                    
pypy3 create: /Users/jaraco/code/main/jaraco.itertools/.tox/pypy3
pypy3: pip_version is pip
pypy3 installdeps: setuptools>=31.0.1
pypy3 develop-inst: /Users/jaraco/code/main/jaraco.itertools
pypy3 installed: appdirs==1.4.3,argcomplete==1.11.1,attrs==19.3.0,black==19.10b0,certifi==2019.11.28,click==7.1.1,coverage==5.1,docutils==0.16,entrypoints==0.3,flake8==3.7.9,importlib-metadata==1.6.0,inflect==4.1.0,-e git+gh://jaraco/jaraco.itertools@3720135f87aeb52b755c50cda9b1a43d42e7fdb7#egg=jaraco.itertools,mccabe==0.6.1,more-itertools==8.2.0,packaging==20.3,pathspec==0.8.0,pip-run==5.3,pipx==0.15.1.3,pluggy==0.13.1,py==1.8.1,pycodestyle==2.5.0,pyflakes==2.1.1,pyparsing==2.4.6,pytest==5.4.1,pytest-black==0.3.8,pytest-black-multipy==1.0.0,pytest-checkdocs==1.2.3,pytest-cov==2.8.1,pytest-flake8==1.0.5,regex==2020.4.4,six==1.14.0,toml==0.10.0,typed-ast==1.4.1,userpath==1.3.0,wcwidth==0.1.9,zipp==3.1.0
pypy3 run-test-pre: PYTHONHASHSEED='2250303190'
pypy3 run-test: commands[0] | pytest
========================================================================== test session starts ===========================================================================
platform darwin -- Python 3.8.2, pytest-5.4.1, py-1.8.1, pluggy-0.13.1
...

Uninstalling tox-venv, PyPy is used.

[rpkilby]

What's the result of import sys; print(sys.real_prefix) for your pypy3 venv?

Also, I would generally no longer recommend using this package. The virtualenv 20.x rewrite solved numerous issues that had necessitated the creation of this plugin, and there isn't much benefit to using this plugin anymore, especially given all the issues it has.

Note that virtualenv now has the ability to delegate the venv module to create environments.
https://virtualenv.pypa.io/en/latest/cli_interface.html#section-creator

[jaraco]

draft $ cat tox.ini
[testenv]
commands = python -c "import sys; print(sys.real_prefix)"
skip_install = True
draft $ tox -r -e pypy3
pypy3 recreate: /Users/jaraco/draft/.tox/pypy3
pypy3 installed: appdirs==1.4.3,argcomplete==1.11.1,attrs==19.3.0,black==19.10b0,certifi==2019.11.28,click==7.1.1,coverage==5.1,docutils==0.16,entrypoints==0.3,flake8==3.7.9,importlib-metadata==1.6.0,inflect==4.1.0,-e git+gh://jaraco/jaraco.itertools@94fcc97d0c144597562a829d9b81e7f62420dc9c#egg=jaraco.itertools,mccabe==0.6.1,more-itertools==8.2.0,packaging==20.3,pathspec==0.8.0,pip-run==5.3,pipx==0.15.1.3,pluggy==0.13.1,py==1.8.1,pycodestyle==2.5.0,pyflakes==2.1.1,pyparsing==2.4.6,pytest==5.4.1,pytest-black==0.3.8,pytest-black-multipy==1.0.0,pytest-checkdocs==1.2.3,pytest-cov==2.8.1,pytest-flake8==1.0.5,regex==2020.4.4,six==1.14.0,toml==0.10.0,typed-ast==1.4.1,userpath==1.3.0,wcwidth==0.1.9,zipp==3.1.0
pypy3 run-test-pre: PYTHONHASHSEED='4266869504'
pypy3 run-test: commands[0] | python -c 'import sys; print(sys.real_prefix)'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
AttributeError: module 'sys' has no attribute 'real_prefix'
ERROR: InvocationError for command /Users/jaraco/draft/.tox/pypy3/bin/python -c 'import sys; print(sys.real_prefix)' (exited with code 1)
________________________________________________________________________________ summary _________________________________________________________________________________
ERROR:   pypy3: commands failed

It seems that the virtualenv is created with the same Python as where tox is installed.

Also, I would generally no longer recommend using this package.

Acknowledged. I'll stop using it.