Dependency issues installing a third party example not based on poetry

[kevinschaich]

• Poetry version: 1.3.2
• Python version: 3.11.1
• OS version and name: macOS Ventura 13.2
• pyproject.toml: https://github.com/pallets/flask/blob/main/examples/celery/pyproject.toml

• I am on the latest stable Poetry version, installed using a recommended method.
• I have searched the issues of this repo and believe that this is not a duplicate.
• I have consulted the FAQ and blog for any relevant entries or release notes.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option) and have included the output below.

Issue

I'm trying to follow a really simple example on the Flask docs and encountered multiple issues. After downloading, I navigated to the examples/celery folder and ran poetry install:

[tool.poetry] section not found in /Users/kevinschaich/repositories/flask/examples/celery/pyproject.toml

I searched around and couldn't find anyone else encountering this – it seems like Poetry should support projects using other tooling like pip/conda/mamba and "upgrade" those configs.

I gave up on trying to fix this and deleted the file since there were only two dependencies, and ran poetry init, then poetry add flask and poetry add celery[redis], and got this nonsensical error complaining about a circular dependency of celery itself:

poetry add 'celery[redis]'
Using version ^5.2.7 for celery

Updating dependencies
Resolving dependencies... (0.0s)

Because no versions of celery match >5.2.7,<6.0.0
 and celery (5.2.7) depends on celery (5.2.7), celery (>=5.2.7,<6.0.0) requires celery (5.2.7).
So, because celery depends on celery (^5.2.7)
 and celery is 0.1.0, version solving failed.```

[kevinschaich]

I tried also using just celery and redis independently with no success, this is the autogenerated pyproject.toml:

[tool.poetry]
name = "celery"
version = "0.1.0"
description = ""
authors = ["kevinschaich <schaich.kevin@gmail.com>"]
readme = "README.md"

[tool.poetry.dependencies]
python = "^3.11"
Flask = "^2.2.2"
celery = "^5.2.7"
redis = "^4.5.1"


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

And when running poetry install:

poetry install
Updating dependencies
Resolving dependencies... (0.0s)

  AssertionError



  at ~/Library/Application Support/pypoetry/venv/lib/python3.11/site-packages/poetry/mixology/incompatibility.py:113 in __str__
      109│         )
      110│
      111│     def __str__(self) -> str:
      112│         if isinstance(self._cause, DependencyCause):
    → 113│             assert len(self._terms) == 2
      114│
      115│             depender = self._terms[0]
      116│             dependee = self._terms[1]
      117│             assert depender.is_positive()

[dimbleby]

what poetry is trying to tell you is that you have created a project with name "celery" and version "0.1.0", and now you are trying to add to it a dependency on "celery" version "5.2.7".

Change the name of your project.

[kevinschaich]

Thanks @dimbleby 🤦‍♂️

[MikeShi42]

Would love to see the assertion error be a bit more verbose on this issue - fwiw just ran into it myself for a new project but luckily this github issue existed :)

[github-actions]

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