Pythonmonkeypatch.setattr() 在模块范围内带有 pytest 固定装置

Question

首先，我的项目目录的相关部分如下所示：└── my_package    ├── my_subpackage    │   ├── my_module.py    |   └── other_module.py    └── tests        └── my_subpackage            └── unit_test.py我正在编写一些测试unit_test.py，需要在模块级别模拟外部资源。我想使用pytest fixture模块级范围并pytest monkeypatch完成此操作。这是我尝试过的片段unit_test.py：import unittest.mock as mockimport pytestfrom my_package.my_subpackage.my_module import [e-mail](scope='function')def external_access(monkeypatch):    external_access = mock.MagicMock()    external_access.get_something = mock.MagicMock(        return_value='Mock was used.')    monkeypatch.setattr(        'my_package.my_subpackage.my_module.ExternalAccess.get_something',        external_access.get_something)def test_get_something(external_access):    instance = MyClass()    instance.get_something()    assert instance.data == 'Mock was used.'一切正常。但是当我尝试将第 8 行从 更改@pytest.fixture(scope='function')为 时@pytest.fixture(scope='module')，出现以下错误。ScopeMismatch: You tried to access the 'function' scoped fixture 'monkeypatch' with a 'module' scoped request object, involved factoriesmy_package\tests\unit_test.py:7:  def external_access(monkeypatch)..\..\Anaconda3\envs\py37\lib\site-packages\_pytest\monkeypatch.py:20:  def monkeypatch()有谁知道如何使用模块级范围进行monkeypatch？如果有人想知道，这也是这两个模块的样子。my_module.pyfrom my_package.my_subpackage.other_module import ExternalAccessclass MyClass(object):    def __init__(self):        self.external_access = ExternalAccess()        self.data = None    def get_something(self):        self.data = self.external_access.get_something()other_module.pyclass ExternalAccess(object):    def get_something(self):        return 'Call to external resource.'