Assertion error when installing Prefect with poetry

[realonbebeto]

when I run: poetry add prefect trying to install prefect 2.10.8

poetry add prefect
Creating virtualenv prefect in /Users/realonbebeto/Kazispace/local/py/prefect/.venv
Using version ^2.10.8 for prefect

Updating dependencies
Resolving dependencies... (0.0s)

AssertionError

at /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/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]

Works fine for me.

Please respect the issue template and provide the details that it asks for.

[realonbebeto]

My apologies for not following throuh the template:

Poetry version: Poetry (version 1.4.2)

• Python version: Python 3.10.11
• OS version and name: macOS 13.3.1
• pyproject.toml:
  [tool.poetry]
  name = "prefect"
  version = "0.1.0"
  description = ""
  authors = ["Bebeto Nyamwamu projobs254@gmail.com"]
  readme = "README.md"

[tool.poetry.dependencies]
python = "^3.10"

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

• 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 am on a new poetry project. I am trying to install Prefect as my first package but there is an assertion error.

Debug mode error:
poetry add prefect -vvv
Loading configuration file /Users/realonbebeto/Library/Preferences/pypoetry/config.toml
Using virtualenv: /Users/realonbebeto/Kazispace/local/py/prefect/.venv
[keyring.backend] Loading KWallet
[keyring.backend] Loading SecretService
[keyring.backend] Loading Windows
[keyring.backend] Loading chainer
[keyring.backend] Loading libsecret
[keyring.backend] Loading macOS
Creating new session for pypi.org
Source (PyPI): 175 packages found for prefect *
Using version ^2.10.8 for prefect

Updating dependencies
Resolving dependencies...
1: fact: prefect is 0.1.0
1: derived: prefect
1: fact: prefect depends on pandas (^2.0.1)
1: Version solving took 0.002 seconds.
1: Tried 1 solutions.

Stack trace:

16 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/cleo/application.py:327 in run
325│
326│ try:
→ 327│ exit_code = self._run(io)
328│ except BrokenPipeError:
329│ # If we are piped to another process, it may close early and send a

15 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/console/application.py:190 in _run
188│ self._load_plugins(io)
189│
→ 190│ exit_code: int = super()._run(io)
191│ return exit_code
192│

14 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/cleo/application.py:431 in _run
429│ io.input.interactive(interactive)
430│
→ 431│ exit_code = self._run_command(command, io)
432│ self._running_command = None
433│

13 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/cleo/application.py:473 in _run_command
471│
472│ if error is not None:
→ 473│ raise error
474│
475│ return terminate_event.exit_code

12 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/cleo/application.py:457 in _run_command
455│
456│ if command_event.command_should_run():
→ 457│ exit_code = command.run(io)
458│ else:
459│ exit_code = ConsoleCommandEvent.RETURN_CODE_DISABLED

11 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/cleo/commands/base_command.py:119 in run
117│ io.input.validate()
118│
→ 119│ status_code = self.execute(io)
120│
121│ if status_code is None:

10 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/cleo/commands/command.py:62 in execute
60│
61│ try:
→ 62│ return self.handle()
63│ except KeyboardInterrupt:
64│ return 1

9 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/console/commands/add.py:262 in handle
260│ self.installer.whitelist([r["name"] for r in requirements])
261│
→ 262│ status = self.installer.run()
263│
264│ if status == 0 and not self.option("dry-run"):

8 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/installation/installer.py:116 in run
114│ self._execute_operations = False
115│
→ 116│ return self._do_install()
117│
118│ def dry_run(self, dry_run: bool = True) -> Installer:

7 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/installation/installer.py:263 in _do_install
261│ source_root=self._env.path.joinpath("src")
262│ ):
→ 263│ ops = solver.solve(use_latest=self._whitelist).calculate_operations()
264│ else:
265│ self._io.write_line("Installing dependencies from lock file")

6 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/puzzle/solver.py:74 in solve
72│ with self._progress(), self._provider.use_latest_for(use_latest or []):
73│ start = time.time()
→ 74│ packages, depths = self._solve()
75│ end = time.time()
76│

5 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/puzzle/solver.py:157 in _solve
155│
156│ try:
→ 157│ result = resolve_version(self._package, self._provider)
158│
159│ packages = result.packages

4 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/mixology/init.py:18 in resolve_version
16│ solver = VersionSolver(root, provider)
17│
→ 18│ return solver.solve()
19│

3 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/mixology/version_solver.py:112 in solve
110│ while next is not None:
111│ self._propagate(next)
→ 112│ next = self._choose_package_version()
113│
114│ return self._result()

2 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/mixology/version_solver.py:432 in _choose_package_version
430│ conflict = False
431│ for incompatibility in self._provider.incompatibilities_for(package):
→ 432│ self._add_incompatibility(incompatibility)
433│
434│ # If an incompatibility is already satisfied, then selecting version

1 /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/poetry/mixology/version_solver.py:468 in _add_incompatibility
466│
467│ def _add_incompatibility(self, incompatibility: Incompatibility) -> None:
→ 468│ self._log(f"fact: {incompatibility}")
469│
470│ for term in incompatibility.terms:

AssertionError

at /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/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]

This is a duplicate of #7768, #7501 etc etc etc, please close

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.