In Python 3.7+ a class __aiter__ must return an async iterator object (an object that implements __anext__). An async generator (an async function with yield) is considered an async iterator object.
The following is valid and should not be flagged as an incorrect async definition.
class Ex(object):
async def __aiter__(self):
count = 0
while count < 50:
count += 1
yield count
The following is invalid and should be flagged as incorrect (it'll also throw a type error or somesuch if actually used in async for).
class Ex(object):
async def __aiter__(self):
count = 0
while count < 50:
count += 1
sobolevn
commented
2 years ago
What's wrong
In Python 3.7+ a class
__aiter__must return an async iterator object (an object that implements__anext__). An async generator (an async function withyield) is considered an async iterator object.The following is valid and should not be flagged as an incorrect async definition.
The following is invalid and should be flagged as incorrect (it'll also throw a type error or somesuch if actually used in
async for).How it should be
See above. Don't throw an error.
Flake8 version and plugins
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pip information
adblockparser==0.7 amkv==0.1.2 anyio==3.5.0 appdirs==1.4.3 apturl==0.5.2 astor==0.8.1 async-generator==1.10 async-timeout==4.0.2 asyncache==0.1.1 atomicwrites==1.1.5 attrs==19.3.0 Automat==0.8.0 bandit==1.7.4 bcrypt==3.1.7 beautifulsoup4==4.11.1 blinker==1.4 Brlapi==0.7.0 Brotli==1.0.9 cachetools==5.0.0 certifi==2019.11.28 cffi==1.14.0 chardet==4.0.0 charset-normalizer==2.0.12 Click==7.0 colorama==0.4.3 command-not-found==0.3 constantly==15.1.0 crit==0.0.1 croniter==1.3.4 cryptography==2.8 cupshelpers==1.0 cycler==0.10.0 Cython==0.29.14 darglint==1.8.1 dblatex===0.3.11py3 dbus-python==1.2.16 decorator==4.4.2 defer==1.0.6 Deprecated==1.2.13 distlib==0.3.0 distro==1.4.0 distro-info===0.23ubuntu1 dnspython==1.16.0 docutils==0.18.1 EditorConfig==0.12.2 entrypoints==0.3 eradicate==2.1.0 et-xmlfile==1.0.1 fasteners==0.14.1 ffmpeg-normalize==1.22.9 ffmpeg-progress-yield==0.2.0 filelock==3.0.12 flake8==4.0.1 flake8-bandit==3.0.0 flake8-broken-line==0.4.0 flake8-bugbear==22.3.23 flake8-class-attributes-order==0.1.3 flake8-commas==2.1.0 flake8-comprehensions==3.8.0 flake8-debugger==4.0.0 flake8-docstrings==1.6.0 flake8-eradicate==1.2.0 flake8-isort==4.1.1 flake8-polyfill==1.0.2 flake8-quotes==3.3.1 flake8-rst-docstrings==0.2.5 flake8-string-format==0.3.0 flakeheaven==0.11.1 funcparserlib==0.3.6 future==0.18.2 gevent==21.12.0 gil-load==0.4.2 gitdb==4.0.9 gitdb2==2.0.6 GitPython==3.1.27 gpg===1.13.1-unknown graphviz==0.16 greenlet==1.1.2 gssapi==1.6.1 h11==0.12.0 h2==4.1.0 h5py==2.10.0 hpack==4.0.0 html5-parser==0.4.10 html5lib==1.0.1 httpcore==0.14.7 httplib2==0.14.0 httpx==0.22.0 hypercorn==0.13.2 hyperframe==6.0.1 hyperlink==19.0.0 idna==2.8 imageio==2.4.1 importlib-metadata==1.5.0 incremental==21.3.0 iotop==0.6 isc==2.0 isort==5.10.1 jdcal==1.0 Jinja2==2.10.1 jsbeautifier==1.10.3 Keras==2.2.4 Keras-Applications==1.0.6 Keras-Preprocessing==1.0.5 keyring==18.0.1 kiwisolver==1.0.1 language-selector==0.1 launchpadlib==1.10.13 lazr.restfulclient==0.14.2 lazr.uri==1.0.3 linecache2==1.0.0 lockfile==0.12.2 louis==3.12.0 lxml==4.5.0 macaroonbakery==1.3.1 Mako==1.1.0 Markdown==3.1.1 MarkupSafe==1.1.0 matplotlib==3.1.2 mccabe==0.6.1 memory-analyzer==0.1.2 meson==0.53.2 mock==3.0.5 monotonic==1.5 more-itertools==4.2.0 mpi4py==3.0.3 msgpack==0.6.2 multidict==6.0.2 mutagen==1.45.1 nest-asyncio==1.5.5 netaddr==0.7.19 netifaces==0.10.4 networkx==2.8 nftables==0.1 nose==1.3.7 numexpr==2.7.1 numpy==1.22.3 oauthlib==3.1.0 objgraph==3.5.0 olefile==0.46 opencv-python==4.5.5.64 openpyxl==3.0.3 outcome==1.1.0 packaging==21.3 pandas==0.25.3 parameterized==0.7.0 paramiko==2.6.0 patsy==0.5.1 pbr==5.4.5 peewee==3.14.10 pep8-naming==0.12.1 pexpect==4.6.0 Pillow==7.0.0 pluggy==0.13.0 ply==3.11 prettytable==2.1.0 priority==1.3.0 protobuf==3.6.1 psutil==5.5.1 py==1.8.1 pyasn1==0.4.2 pyasn1-modules==0.2.1 pycairo==1.16.2 pycodestyle==2.8.0 pycparser==2.19 pycrypto==2.6.1 pycryptodomex==3.14.1 pycups==1.9.73 pydocstyle==6.1.1 pydot==1.4.1 pyflakes==2.4.0 Pygments==2.11.2 PyGObject==3.36.0 pygpu==0.7.6 PyHamcrest==1.9.0 PyJWT==1.7.1 pymacaroons==0.13.0 Pympler==0.9 PyNaCl==1.3.0 pyOpenSSL==19.0.0 pyparsing==3.0.8 PyQt5==5.14.1 PyQtWebEngine==5.14.0 pyRFC3339==1.1 pytest==4.6.9 python-apt==2.0.0+ubuntu0.20.4.6 python-augeas==0.5.0 python-dateutil==2.7.3 python-debian===0.1.36ubuntu1 python-ldap==3.2.0 python-libtorrent==1.1.13 python-multipart==0.0.5 python-yubico==1.3.3 pytz==2019.3 pyusb==1.0.2 PyWavelets==1.3.0 pyxdg==0.26 PyYAML==5.3.1 pyzmq==18.1.1 qrtools==2.0 qt5reactor==0.6 QtPy==1.9.0 redis==4.2.2 reportlab==3.5.34 requests==2.27.1 requests-unixsocket==0.2.0 restructuredtext-lint==1.4.0 rfc3986==1.3.2 salt==3000.2 scikit-image==0.19.2 scipy==1.8.0 seaborn==0.10.0 SecretStorage==2.3.1 selinux==3.0 service-identity==18.1.0 simplejson==3.16.0 sip==4.19.21 six==1.14.0 slip==0.6.5 slip.dbus==0.6.5 smmap==5.0.0 smmap2==2.0.5 sniffio==1.1.0 snowballstemmer==2.0.0 sortedcontainers==2.1.0 soupsieve==1.9.5 splash==3.5 ssh-import-id==5.10 starlette==0.19.0 stevedore==1.32.0 systemd-python==234 tables==3.6.1 testfixtures==6.10.1 testresources==2.0.0 Theano==1.0.4 tifffile==2022.4.8 toml==0.10.0 tqdm==4.64.0 traceback2==1.4.0 trio==0.20.0 Twisted==22.4.0 typing-extensions==4.2.0 ubuntu-advantage-tools==27.4 ubuntu-drivers-common==0.0.0 unattended-upgrades==0.1 unittest2==1.1.0 urllib3==1.26.9 usb-creator==0.3.7 virtualenv==20.0.17 wadllib==1.3.3 wcwidth==0.1.8 webencodings==0.5.1 websockets==10.3 wemake-python-styleguide==0.16.1 Werkzeug==2.1.1 wrapt==1.14.0 wsproto==1.1.0 xdis==6.0.3 xkit==0.0.0 xlrd==1.1.0 xlwt==1.3.0 xvfbwrapper==0.2.9 yarl==1.7.2 youtube-dl==2021.12.17 yt-dlp==2022.4.8 zipp==1.0.0 zope.event==4.5.0 zope.interface==4.7.1
OS information
Ubuntu 20.04