運行pytest的時候，報錯：
C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\Scripts\python.exe E:/workspace2/testpytest/run_case/run_case.py
Traceback (most recent call last):
File "E:/workspace2/testpytest/run_case/run_case.py", line 4, in <module>
pytest.main()
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\config\__init__.py", line 72, in main
config = _prepareconfig(args, plugins)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\config\__init__.py", line 223, in _prepareconfig
pluginmanager=pluginmanager, args=args
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\hooks.py", line 286, in __call__
return self._hookexec(self, self.get_hookimpls(), kwargs)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\manager.py", line 93, in _hookexec
return self._inner_hookexec(hook, methods, kwargs)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\manager.py", line 87, in <lambda>
firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\callers.py", line 203, in _multicall
gen.send(outcome)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\helpconfig.py", line 89, in pytest_cmdline_parse
config = outcome.get_result()
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\callers.py", line 80, in get_result
raise ex[1].with_traceback(ex[2])
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\callers.py", line 187, in _multicall
res = hook_impl.function(*args)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\config\__init__.py", line 742, in pytest_cmdline_parse
self.parse(args)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\config\__init__.py", line 948, in parse
self._preparse(args, addopts=addopts)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\config\__init__.py", line 906, in _preparse
early_config=self, args=args, parser=self._parser
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\hooks.py", line 286, in __call__
return self._hookexec(self, self.get_hookimpls(), kwargs)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\manager.py", line 93, in _hookexec
return self._inner_hookexec(hook, methods, kwargs)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\manager.py", line 87, in <lambda>
firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\callers.py", line 208, in _multicall
return outcome.get_result()
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\callers.py", line 80, in get_result
raise ex[1].with_traceback(ex[2])
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\pluggy\callers.py", line 182, in _multicall
next(gen) # first yield
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\capture.py", line 54, in pytest_load_initial_conftests
capman.start_global_capturing()
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\capture.py", line 112, in start_global_capturing
self._global_capturing = self._getcapture(self._method)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\capture.py", line 88, in _getcapture
return MultiCapture(out=True, err=True, Capture=FDCapture)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\capture.py", line 455, in __init__
self.in_ = Capture(0)
File "C:\Users\18008450\.virtualenvs\workspace2-2rgyBnI9\lib\site-packages\_pytest\capture.py", line 554, in __init__
tmpfile = open(os.devnull, "r")
FileNotFoundError: [Errno 2] No such file or directory: 'nul'
Process finished with exit code 1
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