Docker Builds from python:3.9-slim failing due to broken setuptools`>=58` support for `use_2to3`

[patrickRobotics]

This is the output from docker build

Sending build context to Docker daemon  236.3MB
Step 1/15 : FROM python:3.9-slim
3.9-slim: Pulling from library/python

b503b376: Pulling fs layer 
ac0246d0: Pulling fs layer 
610c2a17: Pulling fs layer 
e6a8a46f: Pulling fs layer 
Digest: sha256:86b3b6af2b6254fe44de9f5c8e6e08248cdef19f3060ee5cf131ef629c375830
Status: Downloaded newer image for python:3.9-slim
 ---> 82941c7e2473
Step 2/15 : ENV PYTHONUNBUFFERED 1
 ---> Running in 1991bb62cf2d
Removing intermediate container 1991bb62cf2d
 ---> f4b69b2edf92
Step 3/15 : RUN mkdir /code
 ---> Running in 63dd3f2fdf15
Removing intermediate container 63dd3f2fdf15
 ---> 10ba58bce505
Step 4/15 : WORKDIR /code
 ---> Running in c3a58c516e93
Removing intermediate container c3a58c516e93
 ---> 3b913b8a2f3e
Step 5/15 : COPY application/requirements.txt /code/
 ---> ae9fba4fa10f
Step 6/15 : RUN pip install -r requirements.txt
 ---> Running in bedf7a63fd76
Collecting amqp==1.4.9
  Downloading amqp-1.4.9-py2.py3-none-any.whl (51 kB)
Collecting anyjson==0.3.3
  Downloading anyjson-0.3.3.tar.gz (8.3 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-ujd46kih/anyjson_bc3d3821b1ec4912838fd80f04ec3dd3/setup.py'"'"'; __file__='"'"'/tmp/pip-install-ujd46kih/anyjson_bc3d3821b1ec4912838fd80f04ec3dd3/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-y6ptic74
         cwd: /tmp/pip-install-ujd46kih/anyjson_bc3d3821b1ec4912838fd80f04ec3dd3/
    Complete output (1 lines):
    error in anyjson setup command: use_2to3 is invalid.
    ----------------------------------------
WARNING: Discarding https://files.pythonhosted.org/packages/c3/4d/d4089e1a3dd25b46bebdb55a992b0797cff657b4477bc32ce28038fdecbc/anyjson-0.3.3.tar.gz#sha256=37812d863c9ad3e35c0734c42e0bf0320ce8c3bed82cd20ad54cb34d158157ba (from https://pypi.org/simple/anyjson/). Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
ERROR: Could not find a version that satisfies the requirement anyjson==0.3.3 (from versions: 0.1, 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.2.5, 0.3, 0.3.1, 0.3.2, 0.3.3)
ERROR: No matching distribution found for anyjson==0.3.3
WARNING: You are using pip version 21.2.4; however, version 22.0.2 is available.
You should consider upgrading via the '/usr/local/bin/python -m pip install --upgrade pip' command.
The command '/bin/sh -c pip install -r requirements.txt' returned a non-zero code: 1

Exited with code exit status 1

setuptools>=58 breaks support for use_2to3: https://setuptools.pypa.io/en/latest/history.html#v58-0-0
which seems to have been added in the latest changes on 3.9 87fb418

[yosifkit]

The setuptools now correctly follows whatever version is bundled with python (#686). It looks like it was an intentional breaking change in setuptools: https://stackoverflow.com/a/69100830 and https://setuptools.pypa.io/en/latest/history.html#v58-0-0.