Python 烧瓶默认pytests失败

我被指示运行以下命令并确保所有测试都通过

git clone https://github.com/pallets/flask
cd flask
python3 -m venv env
. env/bin/activate
pip install -e ".[dev]"
pip install pytest
python -m pytest

虽然所有测试都应该通过，但目前有6或7项测试失败。所有失败都在“tests/test\u instance\u config.py”中。如何确保所有测试都能通过？这些特定测试失败的事实是否重要？我正在运行Ubuntu18LTS

=================================== FAILURES ===================================
____________________________ test_main_module_paths ____________________________

modules_tmpdir = local('/tmp/pytest-of-vedantroy/pytest-1/test_main_module_paths0/modules_tmpdir')
purge_module = <function purge_module.<locals>.inner at 0x7f2c7e4b6e18>

    def test_main_module_paths(modules_tmpdir, purge_module):
        app = modules_tmpdir.join('main_app.py')
        app.write('import flask\n\napp = flask.Flask("__main__")')
        purge_module('main_app')

>       from main_app import app
E       ModuleNotFoundError: No module named 'main_app'

tests/test_instance_config.py:32: ModuleNotFoundError
________________________ test_uninstalled_module_paths _________________________

modules_tmpdir = local('/tmp/pytest-of-vedantroy/pytest-1/test_uninstalled_module_paths0/modules_tmpdir')
purge_module = <function purge_module.<locals>.inner at 0x7f2c7e45c378>

    def test_uninstalled_module_paths(modules_tmpdir, purge_module):
        app = modules_tmpdir.join('config_module_app.py').write(
            'import os\n'
            'import flask\n'
            'here = os.path.abspath(os.path.dirname(__file__))\n'
            'app = flask.Flask(__name__)\n'
        )
        purge_module('config_module_app')

>       from config_module_app import app
E       ModuleNotFoundError: No module named 'config_module_app'

tests/test_instance_config.py:46: ModuleNotFoundError
________________________ test_uninstalled_package_paths ________________________

modules_tmpdir = local('/tmp/pytest-of-vedantroy/pytest-1/test_uninstalled_package_paths0/modules_tmpdir')
purge_module = <function purge_module.<locals>.inner at 0x7f2c7e50abf8>

    def test_uninstalled_package_paths(modules_tmpdir, purge_module):
        app = modules_tmpdir.mkdir('config_package_app')
        init = app.join('__init__.py')
        init.write(
            'import os\n'
            'import flask\n'
            'here = os.path.abspath(os.path.dirname(__file__))\n'
            'app = flask.Flask(__name__)\n'
        )
        purge_module('config_package_app')

>       from config_package_app import app
E       ModuleNotFoundError: No module named 'config_package_app'

tests/test_instance_config.py:61: ModuleNotFoundError
______________________ test_installed_module_paths[True] _______________________

modules_tmpdir = local('/tmp/pytest-of-vedantroy/pytest-1/test_installed_module_paths_Tr0/modules_tmpdir')
modules_tmpdir_prefix = local('/tmp/pytest-of-vedantroy/pytest-1/test_installed_module_paths_Tr0/modules_tmpdir')
purge_module = <function purge_module.<locals>.inner at 0x7f2c7e45c378>
site_packages = local('/tmp/pytest-of-vedantroy/pytest-1/test_installed_module_paths_Tr0/modules_tmpdir/lib/python3.6/site-packages')
limit_loader = None

    def test_installed_module_paths(modules_tmpdir, modules_tmpdir_prefix,
                                    purge_module, site_packages, limit_loader):
        site_packages.join('site_app.py').write(
            'import flask\n'
            'app = flask.Flask(__name__)\n'
        )
        purge_module('site_app')

>       from site_app import app
E       ModuleNotFoundError: No module named 'site_app'

tests/test_instance_config.py:73: ModuleNotFoundError
______________________ test_installed_package_paths[True] ______________________

limit_loader = None
modules_tmpdir = local('/tmp/pytest-of-vedantroy/pytest-1/test_installed_package_paths_T0/modules_tmpdir')
modules_tmpdir_prefix = local('/tmp/pytest-of-vedantroy/pytest-1/test_installed_package_paths_T0/modules_tmpdir')
purge_module = <function purge_module.<locals>.inner at 0x7f2c7e48bd90>
monkeypatch = <_pytest.monkeypatch.MonkeyPatch object at 0x7f2c7e47d080>

    def test_installed_package_paths(limit_loader, modules_tmpdir,
                                     modules_tmpdir_prefix, purge_module,
                                     monkeypatch):
        installed_path = modules_tmpdir.mkdir('path')
        monkeypatch.syspath_prepend(installed_path)

        app = installed_path.mkdir('installed_package')
        init = app.join('__init__.py')
        init.write('import flask\napp = flask.Flask(__name__)')
        purge_module('installed_package')

>       from installed_package import app
E       ModuleNotFoundError: No module named 'installed_package'

tests/test_instance_config.py:89: ModuleNotFoundError
_____________________ test_installed_package_paths[False] ______________________

limit_loader = None
modules_tmpdir = local('/tmp/pytest-of-vedantroy/pytest-1/test_installed_package_paths_F0/modules_tmpdir')
modules_tmpdir_prefix = local('/tmp/pytest-of-vedantroy/pytest-1/test_installed_package_paths_F0/modules_tmpdir')
purge_module = <function purge_module.<locals>.inner at 0x7f2c7e48bd08>
monkeypatch = <_pytest.monkeypatch.MonkeyPatch object at 0x7f2c7e415828>

    def test_installed_package_paths(limit_loader, modules_tmpdir,
                                     modules_tmpdir_prefix, purge_module,
                                     monkeypatch):
        installed_path = modules_tmpdir.mkdir('path')
        monkeypatch.syspath_prepend(installed_path)

        app = installed_path.mkdir('installed_package')
        init = app.join('__init__.py')
        init.write('import flask\napp = flask.Flask(__name__)')
        purge_module('installed_package')

>       from installed_package import app
E       ModuleNotFoundError: No module named 'installed_package'

tests/test_instance_config.py:89: ModuleNotFoundError
_______________________ test_prefix_package_paths[True] ________________________

limit_loader = None
modules_tmpdir = local('/tmp/pytest-of-vedantroy/pytest-1/test_prefix_package_paths_True0/modules_tmpdir')
modules_tmpdir_prefix = local('/tmp/pytest-of-vedantroy/pytest-1/test_prefix_package_paths_True0/modules_tmpdir')
purge_module = <function purge_module.<locals>.inner at 0x7f2c7e47b488>
site_packages = local('/tmp/pytest-of-vedantroy/pytest-1/test_prefix_package_paths_True0/modules_tmpdir/lib/python3.6/site-packages')

    def test_prefix_package_paths(limit_loader, modules_tmpdir,
                                  modules_tmpdir_prefix, purge_module,
                                  site_packages):
        app = site_packages.mkdir('site_package')
        init = app.join('__init__.py')
        init.write('import flask\napp = flask.Flask(__name__)')
        purge_module('site_package')

>       import site_package
E       ModuleNotFoundError: No module named 'site_package'

tests/test_instance_config.py:102: ModuleNotFoundError

==================================================================失败===================================
____________________________测试主模块路径____________________________
模块\u tmpdir=本地（'/tmp/pytest of vedantroy/pytest-1/test\u main\u模块\u路径0/modules\u tmpdir'））
清除模块=
def测试主模块路径（模块tmpdir、净化模块）：
app=modules\u tmpdir.join（'main\u app.py'））
app.write（'import flask\n\napp=flask.flask（“\uuu main\uuuu”））
清除模块（“主应用程序”）
>从主应用程序导入应用程序
E ModuleNotFoundError:没有名为“main\u app”的模块
tests/test\u instance\u config.py:32:ModuleNotFoundError
________________________测试\u卸载的\u模块\u路径_________________________
modules_tmpdir=local（'/tmp/pytest of vedantroy/pytest-1/test_unnstalled_module_paths0/modules_tmpdir'））
清除模块=
def测试\卸载\模块\路径（模块\ tmpdir、清除\模块）：
app=modules\u tmpdir.join（'config\u module\u app.py'）。写入(
'导入操作系统\n'
'导入烧瓶\n'
'here=os.path.abspath（os.path.dirname（_文件__））\n'
'app=flask.flask（\uuuu name\uuuu）\n'
)
清除模块（“配置模块应用程序”）
>从配置模块应用导入应用
E ModuleNotFoundError:没有名为'config\u module\u app'的模块
tests/test\u instance\u config.py:46:ModuleNotFoundError
________________________测试\u卸载的\u包\u路径________________________
modules_tmpdir=local（'/tmp/pytest of vedantroy/pytest-1/test_unnstalled_package_paths0/modules_tmpdir'））
清除模块=
def测试\卸载\包\路径（模块\ tmpdir、清除\模块）：
app=modules\u tmpdir.mkdir（'config\u package\u app'））
init=app.join（“\uuu init\uuuu.py”）
初始化写入(
'导入操作系统\n'
'导入烧瓶\n'
'here=os.path.abspath（os.path.dirname（_文件__））\n'
'app=flask.flask（\uuuu name\uuuu）\n'
)
清除模块（'config\u package\u app'）
>从配置\程序包\应用程序导入应用程序
E ModuleNotFoundError:没有名为'config\u package\u app'的模块
tests/test\u instance\u config.py:61:ModuleNotFoundError
______________________测试安装的模块路径[正确]_______________________
模块\u tmpdir=本地（'/tmp/pytest of vedantroy/pytest-1/test\u已安装模块\u路径\u Tr0/modules\u tmpdir'）
模块\u tmpdir\u前缀=本地（'/tmp/pytest of vedantroy/pytest-1/test\u已安装模块\u路径\u Tr0/modules\u tmpdir'）
清除模块=
site_packages=local（'/tmp/pytest-of-vedantroy/pytest-1/test_-installed_-module_-path_-Tr0/modules_-tmpdir/lib/python3.6/site packages'）
限制加载程序=无
def测试安装的模块路径（模块tmpdir、模块tmpdir前缀、，
清除模块、站点包、限制加载程序）：
site\u包。加入（'site\u app.py'）。写入(
'导入烧瓶\n'
'app=flask.flask（\uuuu name\uuuu）\n'
)
清除模块（“站点应用程序”）
>从站点\应用程序导入应用程序
E ModuleNotFoundError:没有名为“site\u app”的模块
tests/test\u instance\u config.py:73:ModuleNotFoundError
______________________测试\u安装的\u程序包\u路径[正确]______________________
限制加载程序=无
模块\u tmpdir=本地（'/tmp/pytest of vedantroy/pytest-1/test\u已安装\u程序包\u路径\u T0/modules\u tmpdir'）
模块\u tmpdir \u前缀=本地（'/tmp/pytest of vedantroy/pytest-1/test\u已安装\u程序包\u路径\u T0/modules\u tmpdir'）
清除模块=
monkeypatch=
def测试安装路径（限制加载程序、模块、tmpdir、，
模块\u tmpdir\u前缀，清除\u模块，
monkeypatch）：
已安装的\u path=modules\u tmpdir.mkdir（'path'））
monkeypatch.syspath\u prepend（已安装路径）
app=installed_path.mkdir（'installed_package'）
init=app.join（“\uuu init\uuuu.py”）
init.write（'import flask\napp=flask.flask（\uuuu name\uuuuuu'））
清除\u模块（“已安装的\u包”）
>从已安装的软件包导入应用程序
E ModuleNotFoundError:没有名为“installed\u package”的模块
tests/test\u instance\u config.py:89:ModuleNotFoundError
_____________________测试安装的包路径[错误]______________________
限制加载程序=无
模块\u tmpdir=本地（'/tmp/pytest of vedantroy/pytest-1/test_已安装\u程序包\u路径\u F0/模块\u tmpdir'）
模块\u tmpdir\u前缀=本地（'/tmp/pytest of vedantroy/pytest-1/test\u已安装\u程序包\u路径\u F0/modules\u tmpdir'）
清除模块=
monkeypatch=
def测试安装路径（限制加载程序、模块、tmpdir、，
模块\u tmpdir\u前缀，清除\u模块，
monkeypatch）：
已安装的\u path=modules\u tmpdir.mkdir（'path'））
monkeypatch.syspath\u prepend（已安装路径）
app=installed_path.mkdir（'installed_package'）
init=app.join（“\uuu init\uuuu.py”）
init.write（'import flask\napp=flask.flask（\uuuu name\uuuuuu'））
清除\u模块（“已安装的\u包”）
>从已安装的软件包导入应用程序
E ModuleNotFoundError:没有名为“installed\u package”的模块
tests/test\u instance\u config.py:89:ModuleNotFoundError
_______________________测试\前缀\包\路径[真]________________________
限制加载程序=无
modules_tmpdir=local（'/tmp/pytest of vedantroy/pytest-1/test_prefix_package_path_True0/modules_tmpdir'））
modules_tmpdir_prefix=local（'/tmp/pytest of vedantroy/pytest-1/test_prefix_package_path_True0/modules_tmpdir'））
清除模块=
site_packages=local（“/tmp/pytest of vedantroy/pytest-1/test_前缀_package_路径_True0/modules_tmpdir/lib/python3.6/site packages”）
def测试前缀包路径（限制权限）