AttributeError: 'generator' 对象没有属性 'append'

如何解决AttributeError: 'generator' 对象没有属性 'append'

我曾经将此代码作为单元测试运行，但突然不起作用

代码：

    import requests
    import pytest
  
    class TestSample:
        url = 'https://something/apiname'
        @pytest.fixture()
        def post_request(self,data):
            url = self.url + '/1'
            res = requests.post(url,headers={"Content-Type": "application/json"},json=data)
            yield res
    
        @pytest.mark.parametrize("data,result",[( {"ids": ["524234","12341","97555"]},200))]
        def test_post_sample_data(self,data,result,post_request):
             rs = post_request
             assert rs.status_code == result

错误：

platform win32 -- Python 3.6.4,pytest-6.2.4,py-1.10.0,pluggy-0.13.1
plugins: hypothesis-5.37.4,cases-2.3.0
test_selectsample.py:None (test_selectsample.py)
..\..\AppData\Local\Programs\Python\python36\lib\site-packages\pluggy\hooks.py:286: in __call__
    return self._hookexec(self,self.get_hookimpls(),kwargs)
..\..\AppData\Local\Programs\Python\python36\lib\site-packages\pluggy\manager.py:93: in _hookexec
    return self._inner_hookexec(hook,methods,kwargs)
..\..\AppData\Local\Programs\Python\python36\lib\site-packages\pluggy\manager.py:87: in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,..\..\AppData\Local\Programs\Python\python36\lib\site-packages\_pytest\python.py:249: in pytest_pycollect_makeitem
    initialnames,node,ignore_args=self._get_direct_parametrize_args(node)
..\..\AppData\Local\Programs\Python\python36\lib\site-packages\pytest_cases\plugin.py:614: in getfixtureclosure
    _init_fixnames,super_closure,arg2fixturedefs = create_super_closure(fm,parentnode,fixturenames,ignore_args)
..\..\AppData\Local\Programs\Python\python36\lib\site-packages\pytest_cases\plugin.py:668: in create_super_closure
    _merge(sorted_fixturenames,_init_fixnames)
..\..\AppData\Local\Programs\Python\python36\lib\site-packages\pytest_cases\plugin.py:655: in _merge
    into_list.append(item)
E   AttributeError: 'generator' object has no attribute 'append'
collected 0 items / 1 error

==================================== 错误 ============ ==========================

_____________________ ERROR collecting test_selectids.py ______________________
..\..\AppData\Local\Programs\Python\python36\lib\site-packages\pluggy\hooks.py:286: in __call__
    return self._hookexec(self,kwargs)
    res = list(collector._genfunctions(name,obj))
..\..\AppData\Local\Programs\Python\python36\lib\site-packages\_pytest\python.py:458: in _genfunctions
    initialnames,_init_fixnames)
..\..\AppData\Local\Programs\Python\python36\lib\site-packages\pytest_cases\plugin.py:655: in _merge
    into_list.append(item)
E   AttributeError: 'generator' object has no attribute 'append'
=========================== short test summary info ===========================
ERROR test_selectsample.py::TestSample - AttributeError: 'generator' object ha...
!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
============================== 1 error in 0.35s ===============================
Process finished with exit code 0
Assertion Failed
Assertion Failed

知道是什么原因造成的吗？我该如何预防？ 提前致谢

解决方法

pytest.mark.parametrize 的第二个参数需要是元组列表。在你这样的例子中：

@pytest.mark.parametrize("data,result",[
    ({"ids": ["524234","12341","97555"]},200),])
def test_post_sample_data(self,data,result,post_request):
    rs = post_request
    assert rs.status_code == result

编辑：

• 尝试将 @pytest.fixture() 上方的 post_request 替换为 @pytest.fixture
• 夹具有 data 参数，看起来好像没有填充任何地方

,

此问题已通过更改解释器的版本得到解决。我将 python3.6 更改为 3.8，问题解决了！希望这篇文章对某人有用