python - 模块“io”没有属性“_WindowsConsoleIO”

Question

我正在尝试让 pytest 在 Windows PC 上运行。它在一台机器上运行良好，但即使我只是尝试，另一台机器也会出错pytest.exe --version。工作的机器是 Windows 10 商业版，但这个机器是 Windows 10 家庭版 (x64)。它安装了多个版本的 Python，但我尝试在 3.6 和 3.6-32 下运行它，结果没有差异。

它是通过以下方式安装的：py -3.6 -m pip install -U pytest

运行的输出pytest.exe --version是：

PS C:\tests\unit> pytest.exe --version
Traceback (most recent call last):
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\runpy.py", line 184, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\pyuser\AppData\Local\Programs\Python\python36\Scripts\pytest.exe\__main__.py", line 9, in <module>
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\_pytest\config\__init__.py", line 63, in main
    config = _prepareconfig(args, plugins)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\_pytest\config\__init__.py", line 207, in _prepareconfig
    pluginmanager=pluginmanager, args=args
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\hooks.py", line 289, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\manager.py", line 87, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\manager.py", line 81, in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\callers.py", line 203, in _multicall
    gen.send(outcome)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\_pytest\helpconfig.py", line 94, in pytest_cmdline_parse
    config = outcome.get_result()
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\_pytest\config\__init__.py", line 687, in pytest_cmdline_parse
    self.parse(args)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\_pytest\config\__init__.py", line 895, in parse
    self._preparse(args, addopts=addopts)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\_pytest\config\__init__.py", line 851, in _preparse
    early_config=self, args=args, parser=self._parser
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\hooks.py", line 289, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\manager.py", line 87, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\manager.py", line 81, in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\callers.py", line 208, in _multicall
    return outcome.get_result()
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\pluggy\callers.py", line 182, in _multicall
    next(gen)  # first yield
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\_pytest\capture.py", line 50, in pytest_load_initial_conftests
    _py36_windowsconsoleio_workaround(sys.stdout)
  File "c:\users\pyuser\appdata\local\programs\python\python36\lib\site-packages\_pytest\capture.py", line 820, in _py36_windowsconsoleio_workaround
    if not isinstance(raw_stdout, io._WindowsConsoleIO):
AttributeError: module 'io' has no attribute '_WindowsConsoleIO'

我在网上找不到对此问题的任何引用，我也不知道为什么该io模块会缺少该_WindowsConsoleIO属性。

标签： pythonpython-3.xwindowsunit-testinginstallation