SolverProblem in Docker

• 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).

• Docker: python:3.8.0:
• Poetry version: 1.0.5:
• Link to Github with the contents of your pyproject.toml file:

Issue

Alright, I think I must be missing something here. I have a Dockerfile that starts from python:3.8.0, I install poetry, then try to run poetry install and get a SovlerProblemError

Traceback:

[SolverProblemError]
The current project's Python requirement (2.7.16) is not compatible with some of the required packages Python requirement:
  - black requires Python >=3.6

Because black (19.10b0) requires Python >=3.6
 and no versions of black match >19.10b0,<20.0, black is forbidden.
So, because grade depends on black (^19.10b0), version solving failed.

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/clikit/console_application.py", line 131, in run
    status_code = command.handle(parsed_args, io)
  File "/usr/local/lib/python3.8/site-packages/clikit/api/command/command.py", line 120, in handle
    status_code = self._do_handle(args, io)
  File "/usr/local/lib/python3.8/site-packages/clikit/api/command/command.py", line 171, in _do_handle
    return getattr(handler, handler_method)(args, io, self)
  File "/usr/local/lib/python3.8/site-packages/cleo/commands/command.py", line 92, in wrap_handle
    return self.handle()
  File "/usr/local/lib/python3.8/site-packages/poetry/console/commands/install.py", line 63, in handle
    return_code = installer.run()
  File "/usr/local/lib/python3.8/site-packages/poetry/installation/installer.py", line 74, in run
    self._do_install(local_repo)
  File "/usr/local/lib/python3.8/site-packages/poetry/installation/installer.py", line 225, in _do_install
    ops = solver.solve(use_latest=whitelist)
  File "/usr/local/lib/python3.8/site-packages/poetry/puzzle/solver.py", line 36, in solve
    packages, depths = self._solve(use_latest=use_latest)
  File "/usr/local/lib/python3.8/site-packages/poetry/puzzle/solver.py", line 190, in _solve
    raise SolverProblemError(e)

Dockerfile:

FROM python:3.8.0

# First let's just get things updated.
RUN apt-get -y update --fix-missing && apt-get -y upgrade

# Dependancies
RUN apt-get install -y \
    make \
    gcc \
    clang \
    valgrind \
    git \
    build-essential \
    software-properties-common \
    wget \
    curl

RUN curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python

# Install grade
RUN mkdir /app/
COPY . /app/

# Defaults
WORKDIR /app/
RUN python -m pip install --upgrade pip \
    && python -m pip install poetry \
    && poetry config virtualenvs.create false \
    && poetry -V \
    && poetry install -vvv

pyproject.toml

[tool.poetry]
name = "grade"
version = "2.1.5"
description = "a package focused on autograding"
authors = ["Tom <[e-mail]>"]
license = "AGPL-3.0"
packages = [
    { include = "grade" }
]

[tool.poetry.dependencies]
python = "^3.6"
click = "^7.0"

[tool.poetry.dev-dependencies]
Sphinx = "^2.4.1"
coverage = "^5.0.3"
black = "^19.10b0"
python-semantic-release = "^4.10.0"
toml = "^0.10.0"

[tool.semantic_release]
version_variable = "pyproject.toml:version"
commit_message = "build: version bump to v${version}"

[build-system]
requires = ["poetry>=0.12"]
build-backend = "poetry.masonry.api

[dandreevv]

Hi, can you attach pyproject.toml here? Also you should try to add poetry env use 3.8 in your Dockerfile.

[thoward27]

@finswimmer that worked! I tried to recreate my bug for a while, it looks like something was broken in my .venv, which is super confusing as I cannot even find python2 on my system at all… either way, I’m good now, thanks for all the help!