关于#python#的问题：使用pytest-xdist运行测试用例，执行命令 pytest -n 2，执行时只有一个进程在执行

Question

使用pytest-xdist运行测试用例，执行命令 pytest -n 2，执行时只有一个进程在执行。Python的版本：3.9.6，pytest-xdist插件版本：2.5.0。求解答

执行命令
PS D:\daima-tool> pytest -n 2 .\test_case.py

执行的结果
platform win32 -- Python 3.9.6, pytest-7.0.1, pluggy-1.0.0 -- D:\Python\python39.exe
cachedir: .pytest_cache
metadata: {'Python': '3.9.6', 'Platform': 'Windows-10-10.0.19045-SP0', 'Packages': {'pytest': '7.0.1', 'py': '1.11.0', 'pluggy': '1.0.0'}, 'Plugins': {'allure-pytest'
: '2.9.45', 'forked': '1.4.0', 'html': '3.1.1', 'metadata': '2.0.1', 'ordering': '0.6', 'rerunfailures': '10.2', 'xdist': '2.5.0'}, 'JAVA_HOME': 'D:\\java'}
rootdir: D:\daima-tool\controller-test, configfile: pytest.ini
plugins: allure-pytest-2.9.45, forked-1.4.0, html-3.1.1, metadata-2.0.1, ordering-0.6, rerunfailures-10.2, xdist-2.5.0
[gw0] win32 Python 3.9.6 cwd: D:\daima-tool\controller-test
[gw1] win32 Python 3.9.6 cwd: D:\daima-tool\controller-test
[gw0] Python 3.9.6 (tags/v3.9.6:db3ff76, Jun 28 2021, 15:26:21) [MSC v.1929 64 bit (AMD64)]
[gw1] Python 3.9.6 (tags/v3.9.6:db3ff76, Jun 28 2021, 15:26:21) [MSC v.1929 64 bit (AMD64)]
gw0 [2551] / gw1 [2551]
scheduling tests via LoadScopeScheduling

test_case.py::Test::test_voice[case0]
[gw0] [  0%] FAILED test_case.py::Test::test_voice[case0]
test_case.py::Test::test_voice[case1]
[gw0] [  0%] PASSED test_case.py::Test::test_voice[case1]
test_case.py::Test::test_voice[case2]
[gw0] [  0%] FAILED test_case.py::Test::test_voice[case2]
test_case.py::Test::test_voice[case3]
[gw0] [  0%] PASSED test_case.py::Test::test_voice[case3]
test_case.py::Test::test_voice[case4]
[gw0] [  0%] PASSED test_case.py::Test::test_voice[case4]
test_case.py::Test::test_voice[case5]
[gw0] [  0%] PASSED test_case.py::Test::test_voice[case5]
test_case.py::Test::test_voice[case6]
[gw0] [  0%] PASSED test_case.py::Test::test_voice[case6]

Answer 1

可能是因为您的运行环境中有多个Python解释器，而pytest-xdist默认只在主解释器上运行测试用例，导致无法启动其他进程。
你可以尝试使用Python解释器来做下指定，可以参考：

pytest -n 2 --python=python3 test_case.py

其中，--python选项指定要使用的Python解释器，您需要将其替换为您实际的Python解释器名称或路径。另外，您还可以尝试使用-vv选项来查看更详细的运行过程和输出信息。
如果仍然无法解决问题，您可以尝试升级pytest-xdist插件版本或者重新安装该插件，以确保它与您的Python解释器版本兼容。

还有问题的话再问我好了