use_2to3 is invalid (Tempita)

setuptools version

setuptools==58.0.4

Python version

Python 3.7

OS

alpine 3.10 and python:3.7.4-alpine3.10

Additional environment information

Running in docker image

Description

Error when install Tempita package

Collecting tempita
  Using cached Tempita-0.5.2.tar.gz (12 kB)
    ERROR: Command errored out with exit status 1:
     command: /usr/local/bin/python -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-w1dwys3_/tempita_88536193c2e747c5939cf0c8202599ac/setup.py'"'"'; __file__='"'"'/tmp/pip-install-w1dwys3_/tempita_88536193c2e747c5939cf0c8202599ac/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-zh352qvj
         cwd: /tmp/pip-install-w1dwys3_/tempita_88536193c2e747c5939cf0c8202599ac/
    Complete output (1 lines):
    error in Tempita setup command: use_2to3 is invalid.

A similar error are rased when install formencode==1.3.1

Expected behavior

Success in installation

How to Reproduce

pip install formencode==1.3.1 pip install --upgrade tempita

Output

 ERROR: Command errored out with exit status 1:
     command: /usr/local/bin/python -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-w1dwys3_/tempita_88536193c2e747c5939cf0c8202599ac/setup.py'"'"'; __file__='"'"'/tmp/pip-install-w1dwys3_/tempita_88536193c2e747c5939cf0c8202599ac/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-zh352qvj
         cwd: /tmp/pip-install-w1dwys3_/tempita_88536193c2e747c5939cf0c8202599ac/
    Complete output (1 lines):
    error in Tempita setup command: use_2to3 is invalid.

Code of Conduct

• I agree to follow the PSF Code of Conduct

[jaraco]

Thanks Ian. I’ve uploaded a wheel for Tempita 0.5.2:

draft $ pip-run 'setuptools<58' wheel -- -m pip wheel --use-pep517 --no-build-isolation Tempita
Collecting setuptools<58
  Using cached setuptools-57.5.0-py3-none-any.whl (819 kB)
Collecting wheel
  Using cached wheel-0.37.0-py2.py3-none-any.whl (35 kB)
Installing collected packages: wheel, setuptools
Successfully installed setuptools-57.5.0 wheel-0.37.0
Collecting Tempita
  Using cached Tempita-0.5.2.tar.gz (12 kB)
    Preparing wheel metadata ... done
Building wheels for collected packages: Tempita
  Building wheel for Tempita (PEP 517) ... done
  Created wheel for Tempita: filename=Tempita-0.5.2-py3-none-any.whl size=12880 sha256=f4554840cb59c6b4a5df4fad27eea4e3cb47ca7089bfeefb5890ff1bb8af2117
  Stored in directory: /Users/jaraco/Library/Caches/pip/wheels/14/32/85/b64bd548315cce3f2c1c7cd655fce15fd5b22af89778bbf267
Successfully built Tempita
draft $ twine upload Tempita-0.5.2-py3-none-any.whl
Uploading distributions to https://upload.pypi.org/legacy/
Uploading Tempita-0.5.2-py3-none-any.whl
100%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 16.5k/16.5k [00:01<00:00, 11.5kB/s]

View at:
https://pypi.org/project/Tempita/0.5.2/

Now any users installing with pip (and presumably poetry) will bypass setuptools builds and thus will not fail. Please confirm.

[StevenMMortimer]

This comment is the only workaround that I’ve found for now: https://github.com/python-poetry/poetry/issues/4511#issue-998383431

In short, it installs a pinned version of setuptools (e.g., setuptools==57.5.0) outside of pyproject.toml and then runs poetry install.