Python pytest 挂起。例如，“pytest --version”只是挂起

Question

以下挂起：

PS C:\Users\Fowler> pytest --version  

笔记：

• 我在 Windows 10 中。
• 我所说的挂起，是指至少等待 5 分钟等待 pytest --version 返回......
• 在等待 pytest 时，python.exe 正在使用我计算机上 100% 的逻辑处理器。
• 我使用 Windows 安装程序卸载了所有 python 安装，并重新安装了 python 3.8.0 以尝试修复。
• pytest 仅在我不使用 venv 时才会失败。所以，pytest确实可以使用 venv 工作。
• 但是，我无法将 venv 与 vscode 一起使用，因为使用 venv 进行调试会出现奇怪的“Session-1 超时等待被调试者生成” <-- 您可能会认为“调试者”这个词是一个很好的线索，但发现的不多谷歌上有这个词。我猜这是一个不同的问题，但也许相关？
• 总之，我无法使用 venv 调试 python，并且在没有 venv 的情况下无法运行 pytest 单元测试。也许，这些项目是不相关的......但是，由于这个第 22 条军规，我将非常感谢任何解决这两个问题的提示。

当我点击<ctrl-c>打破 pytest“挂起”时，显示以下内容（但每次最后都会改变一点？：

Traceback (most recent call last):
  File "c:\program files\python38\lib\runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\program files\python38\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\Scripts\pytest.exe\__main__.py", line 7, in <module>
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\_pytest\config\__init__.py", line 72, in main
    config = _prepareconfig(args, plugins)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\_pytest\config\__init__.py", line 222, in _prepareconfig
    return pluginmanager.hook.pytest_cmdline_parse(
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\pluggy\hooks.py", line 286, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\pluggy\manager.py", line 93, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\pluggy\manager.py", line 84, in <lambda>
    self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\pluggy\callers.py", line 203, in _multicall
    gen.send(outcome)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\_pytest\helpconfig.py", line 89, in pytest_cmdline_parse
    config = outcome.get_result()
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\pluggy\callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\pluggy\callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\_pytest\config\__init__.py", line 742, in pytest_cmdline_parse
    self.parse(args)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\_pytest\config\__init__.py", line 948, in parse
    self._preparse(args, addopts=addopts)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\_pytest\config\__init__.py", line 896, in _preparse
    self.pluginmanager.load_setuptools_entrypoints("pytest11")
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\pluggy\manager.py", line 299, in load_setuptools_entrypoints
    plugin = ep.load()
  File "c:\program files\python38\lib\importlib\metadata.py", line 75, in load
    module = import_module(match.group('module'))
  File "c:\program files\python38\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\_pytest\assertion\rewrite.py", line 138, in exec_module
    _write_pyc(state, co, source_stat, pyc)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\_pytest\assertion\rewrite.py", line 274, in _write_pyc
    with atomic_write(fspath(pyc), mode="wb", overwrite=True) as fp:
  File "c:\program files\python38\lib\contextlib.py", line 113, in __enter__
    return next(self.gen)
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\atomicwrites\__init__.py", line 156, in _open
    with get_fileobject(**self._open_kwargs) as f:
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\atomicwrites\__init__.py", line 173, in get_fileobject
    descriptor, name = tempfile.mkstemp(suffix=suffix, prefix=prefix,
  File "c:\program files\python38\lib\tempfile.py", line 332, in mkstemp
    return _mkstemp_inner(dir, prefix, suffix, flags, output_type)
  File "c:\program files\python38\lib\tempfile.py", line 247, in _mkstemp_inner
    file = _os.path.join(dir, pre + name + suf)
KeyboardInterrupt

下次尝试运行时pytest --version，我的<ctrl-c>结果是：

Traceback (most recent call last):
  File "c:\program files\python38\lib\runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
...
...
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\atomicwrites\__init__.py", line 173, in get_fileobject
    descriptor, name = tempfile.mkstemp(suffix=suffix, prefix=prefix,
  File "c:\program files\python38\lib\tempfile.py", line 332, in mkstemp
    return _mkstemp_inner(dir, prefix, suffix, flags, output_type)
  File "c:\program files\python38\lib\tempfile.py", line 248, in _mkstemp_inner
    _sys.audit("tempfile.mkstemp", file)
KeyboardInterrupt

下次尝试运行时pytest --version，我的<ctrl-c>结果是：

Traceback (most recent call last):
  File "c:\program files\python38\lib\runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
...
...
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\atomicwrites\__init__.py", line 173, in get_fileobject
    descriptor, name = tempfile.mkstemp(suffix=suffix, prefix=prefix,
  File "c:\program files\python38\lib\tempfile.py", line 332, in mkstemp
    return _mkstemp_inner(dir, prefix, suffix, flags, output_type)
  File "c:\program files\python38\lib\tempfile.py", line 256, in _mkstemp_inner
    if (_os.name == 'nt' and _os.path.isdir(dir) and
  File "c:\program files\python38\lib\genericpath.py", line 42, in isdir
    st = os.stat(s)
KeyboardInterrupt

下次尝试运行时pytest --version，我的<ctrl-c>结果是：

Traceback (most recent call last):
  File "c:\program files\python38\lib\runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
...
...
  File "C:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\atomicwrites\__init__.py", line 173, in get_fileobject
    descriptor, name = tempfile.mkstemp(suffix=suffix, prefix=prefix,
  File "c:\program files\python38\lib\tempfile.py", line 332, in mkstemp
    return _mkstemp_inner(dir, prefix, suffix, flags, output_type)
  File "c:\program files\python38\lib\tempfile.py", line 250, in _mkstemp_inner
    fd = _os.open(file, flags, 0o600)
KeyboardInterrupt

我不知道这个输出是否有帮助，但我认为查看我的机器上安装 python 和/或 pytest 的所有位置可能很有用：

PS C:\Users\Fowler> where.exe /r c:\ python
c:\Program Files\Amazon\AWSCLI\runtime\python.exe
c:\Program Files\Amazon\AWSSAMCLI\runtime\python.exe
c:\Program Files\MySQL\MySQL Workbench 8.0 CE\python.exe
c:\Program Files\Python38\python.exe
c:\Program Files\Python38\Lib\venv\scripts\nt\python.exe
c:\Users\Fowler\.vscode\extensions\lextudio.restructuredtext-116.0.0\out\python.js
c:\Users\Fowler\.vscode\extensions\teabyii.ayu-0.18.0\test\Python.py
c:\Users\Fowler\.vscode\extensions\yzane.markdown-pdf-1.4.1\node_modules\highlight.js\lib\languages\python.js
c:\Users\Fowler\AppData\Local\GitHubDesktop\app-2.2.2\resources\app\highlighter\mode\python.js
c:\Users\Fowler\AppData\Local\GitHubDesktop\app-2.2.3\resources\app\highlighter\mode\python.js
c:\Users\Fowler\AppData\Local\Google\Chrome\User Data\Default\Extensions\ngkhgikojglcgnckopipfdajaifmmnnc\4.1.34_0\python.js
c:\Users\Fowler\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState\rootfs\etc\apparmor.d\abstractions\python
c:\Users\Fowler\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState\rootfs\usr\share\bash-completion\completions\python
c:\Users\Fowler\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState\rootfs\usr\share\bash-completion\helpers\python
c:\Users\Fowler\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState\rootfs\usr\share\sosreport\sos\plugins\python.py
c:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\aniso8601\builders\python.py
c:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\_pytest\python.py
c:\Users\Fowler\Documents\vscodeProjects\playarea\.venv\Scripts\python.exe
c:\Windows\Installer\$PatchCache$\Managed\8B9C64EBE8DD53846B6846E46A14F5EE\3.7.2150\python.exe
c:\Windows\Installer\$PatchCache$\Managed\9CB0624238F6F8F469EAD6566412DD7F\3.7.2150\python.exe

PS C:\Users\Fowler> where.exe /r c:\ pytest
c:\Users\Fowler\AppData\Roaming\Python\Python38\Scripts\pytest.exe
c:\Users\Fowler\AppData\Roaming\Python\Python38\site-packages\pytest.py

最后！哇哦，万一这能说明问题，下面这张图片显示了 python 进程在 pytest.py 期间愉快地耗尽了我的 CPU...

如果有任何帮助或想法，我将非常感激！

Answer 1

固定的。

答案似乎是

1. 通过 Windows 应用程序和功能卸载 python
2. 删除c:\program files\python38目录
3. 删除 ..\AppData\Roaming\Python 目录
4. 重新安装

不确定“根本”问题是什么，但彻底清除 python 修复了它。请注意，python windows 安装程序不会删除足够的 python 内容。

谢谢@nneonneo 让我思考正确的方向。