pytest cannot be executed from Python 3.10.4

Question

I already saw one old post regarding this topic - An error while trying to execute tests on python 3.10 with pytest,

I am having the same problem, Python 3.10.4 and pytest 7.1.2, when I start command:

$ pipenv run pytest

I get an error:

$ pipenv run pytest
============================= test session starts =============================
platform win32 -- Python 3.10.4, pytest-4.0.0, py-1.7.0, pluggy-0.8.0
rootdir: **DIR**, inifile:
collected 0 items / 1 errors

=================================== ERRORS ====================================
____________________ ERROR collecting test/test_person.py _____________________
<frozen importlib._bootstrap>:939: in _find_spec
    ???
E   AttributeError: 'AssertionRewritingHook' object has no attribute 'find_spec'

During handling of the above exception, another exception occurred:
**LOCAL_PATH**\.virtualenvs\iamdb-2ZawZA6J\lib\site-packages\py\_path\local.py:668: in pyimport
    __import__(modname)
<frozen importlib._bootstrap>:1027: in _find_and_load
    ???
<frozen importlib._bootstrap>:1002: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:941: in _find_spec
    ???
<frozen importlib._bootstrap>:915: in _find_spec_legacy
    ???
**LOCAL_PATH**\.virtualenvs\iamdb-2ZawZA6J\lib\site-packages\_pytest\assertion\rewrite.py:162: in find_module
    source_stat, co = _rewrite_test(self.config, fn_pypath)
**LOCAL_PATH**\.virtualenvs\iamdb-2ZawZA6J\lib\site-packages\_pytest\assertion\rewrite.py:412: in _rewrite_test
    co = compile(tree, fn.strpath, "exec", dont_inherit=True)
E   TypeError: required field "lineno" missing from alias
!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!
=========================== 1 error in 0.16 seconds ===========================

Anyone has a solution?

Well, you are using pytest 4.0.0, not 7.1.2, so this is to be expected. — MrBean Bremen
– MrBean Bremen, Commented May 18, 2022 at 17:42
I see, but when I check: $ pytest --version, I get: pytest 7.1.2 — John
– John, Commented May 18, 2022 at 17:43
Looks like your tests runs in a different environment, check your venv (e.g. pipenv). — MrBean Bremen
– MrBean Bremen, Commented May 18, 2022 at 17:44
You are using 4.0.0, this is an old version not working with Python 3.10 - not sure what you mean by downgrading. You need to upgrade it instead in your venv. — MrBean Bremen
– MrBean Bremen, Commented May 18, 2022 at 17:47

Deep Panchal · Accepted Answer · 2022-06-09 17:20:36Z

5

I faced the same issue when using poetry. In my case, pytest was set to v5.2:

[tool.poetry.dev-dependencies]
pytest = "^5.2"

After updating pytest to ^7.1.2, things started working.

poetry add -D pytest@latest

[tool.poetry.dev-dependencies]
pytest = "^7.1.2"

edited Jun 9, 2022 at 17:20

answered Jun 9, 2022 at 17:07

Deep Panchal

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1 Comment

Markus Ressel Over a year ago

This helped me find the root cause on my project, which was the min python version of 3.4, which apparently prevented poetry from using the latest pytest version. Upped it to 3.7 (because I can just do that) and it worked.

John · Accepted Answer · 2022-05-18 18:29:36Z

1

As per comment from Marco Bonelli, pytest had no correct version. So command:

pipenv update pytest

fixed the issue.

answered May 18, 2022 at 18:29

John

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Comments

Stefan · Accepted Answer · 2022-07-08 05:09:28Z

In my case I had the recent pytest version 7.1.2.

Downgrading did not help.
Removing my pyproject.toml file also did not help. (Thought it might be a pylint configuration issue.)

In the error message another package occurred (that I did not use at all in that specific project but that was nevertheless installed in my environment): dash.

=> Updating dash to the latest version resolved the issue.

=> I have no idea why.

=> If pytest does not run, check if updating some other packages that occur in the error message helps.

PS C:\python_env\workspace\hello_world_with_tests> pytest
Traceback (most recent call last): 
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\runpy.py", line 196, in _run_module_as_main 
    return _run_code(code, main_globals, None,
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\Scripts\pytest.exe\__main__.py", line 7, in <module>
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\_pytest\config\__init__.py", line 187, in console_main
    code = main()
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\_pytest\config\__init__.py", line 145, in main
    config = _prepareconfig(args, plugins)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\_pytest\config\__init__.py", line 324, in _prepareconfig
    config = pluginmanager.hook.pytest_cmdline_parse(
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\pluggy\_hooks.py", line 265, in __call__
    return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\pluggy\_manager.py", line 80, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\pluggy\_callers.py", line 55, in _multicall
    gen.send(outcome)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\_pytest\helpconfig.py", line 102, in pytest_cmdline_parse
    config: Config = outcome.get_result()
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\pluggy\_result.py", line 60, in get_result
    raise ex[1].with_traceback(ex[2])
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\pluggy\_callers.py", line 39, in _multicall
    res = hook_impl.function(*args)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\_pytest\config\__init__.py", line 1016, in pytest_cmdline_parse
    self.parse(args)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\_pytest\config\__init__.py", line 1304, in parse
    self._preparse(args, addopts=addopts)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\_pytest\config\__init__.py", line 1187, in _preparse
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\pluggy\_manager.py", line 287, in load_setuptools_entrypoints
    plugin = ep.load()
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\importlib\metadata\__init__.py", line 171, in load
    module = import_module(match.group('module'))
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 992, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 992, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\_pytest\assertion\rewrite.py", line 168, in exec_module
    exec(co, module.__dict__)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\dash\__init__.py", line 5, in <module>
    from .dash import Dash, no_update  # noqa: F401,E402
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\_pytest\assertion\rewrite.py", line 168, in exec_module
    exec(co, module.__dict__)
  File "C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\dash\dash.py", line 18, in <module>
ImportError: cannot import name 'get_current_traceback' from 'werkzeug.debug.tbtools' (C:\python_env\App\WinPython\python-3.10.4.amd64\lib\site-packages\werkzeug\debug\tbtools.py)

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