{"html_url": "https://github.com/simonw/datasette/pull/1481#issuecomment-939074818", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/1481", "id": 939074818, "node_id": "IC_kwDOBm6k_c43-SUC", "user": {"value": 9599, "label": "simonw"}, "created_at": "2021-10-08T19:40:23Z", "updated_at": "2021-10-08T19:40:23Z", "author_association": "OWNER", "body": "Then I created myself a temporary 3.10 environment using `pipenv` like so:\r\n\r\n    cd /tmp\r\n    mkdir py310\r\n    cd py310\r\n    pipenv shell --python /Users/simon/.pyenv/versions/3.10.0/bin/python\r\n\r\nAnd used that with my Datasette checkout like so:\r\n\r\n    cd ~/.../datasette\r\n    pip install -e '.[test]'\r\n    pytest\r\n", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 1020436713, "label": "Fix compatibility with Python 3.10"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/pull/1481#issuecomment-939075686", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/1481", "id": 939075686, "node_id": "IC_kwDOBm6k_c43-Shm", "user": {"value": 9599, "label": "simonw"}, "created_at": "2021-10-08T19:42:00Z", "updated_at": "2021-10-08T19:42:00Z", "author_association": "OWNER", "body": "Running `pytest -x --pdb` helped me see this error:\r\n\r\n```\r\n  File \"/Users/simon/Dropbox/Development/datasette/datasette/views/base.py\", line 122, in dispatch_request\r\n    await self.ds.refresh_schemas()\r\n  File \"/Users/simon/Dropbox/Development/datasette/datasette/app.py\", line 344, in refresh_schemas\r\n    await self._refresh_schemas()\r\n  File \"/Users/simon/Dropbox/Development/datasette/datasette/app.py\", line 349, in _refresh_schemas\r\n    await init_internal_db(internal_db)\r\n  File \"/Users/simon/Dropbox/Development/datasette/datasette/utils/internal_db.py\", line 5, in init_internal_db\r\n    await db.execute_write(\r\n  File \"/Users/simon/Dropbox/Development/datasette/datasette/database.py\", line 102, in execute_write\r\n    return await self.execute_write_fn(_inner, block=block)\r\n  File \"/Users/simon/Dropbox/Development/datasette/datasette/database.py\", line 113, in execute_write_fn\r\n    reply_queue = janus.Queue()\r\n  File \"/Users/simon/.local/share/virtualenvs/py310-Z8fTATkJ/lib/python3.10/site-packages/janus/__init__.py\", line 39, in __init__\r\n    self._async_not_empty = asyncio.Condition(self._async_mutex)\r\n  File \"/Users/simon/.pyenv/versions/3.10.0/lib/python3.10/asyncio/locks.py\", line 234, in __init__\r\n    raise ValueError(\"loop argument must agree with lock\")\r\nValueError: loop argument must agree with lock\r\n```", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 1020436713, "label": "Fix compatibility with Python 3.10"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/pull/1481#issuecomment-939076399", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/1481", "id": 939076399, "node_id": "IC_kwDOBm6k_c43-Ssv", "user": {"value": 9599, "label": "simonw"}, "created_at": "2021-10-08T19:43:33Z", "updated_at": "2021-10-08T19:43:33Z", "author_association": "OWNER", "body": "So maybe this is an issue with Janus? I'm using https://pypi.org/project/janus/ 0.6.1 which is the latest release, from October 2020.", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 1020436713, "label": "Fix compatibility with Python 3.10"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/pull/1481#issuecomment-939078095", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/1481", "id": 939078095, "node_id": "IC_kwDOBm6k_c43-THP", "user": {"value": 9599, "label": "simonw"}, "created_at": "2021-10-08T19:47:29Z", "updated_at": "2021-10-08T19:47:29Z", "author_association": "OWNER", "body": "Only mention I can find of that \"loop argument must agree with lock\" error is here - which doesn't have any tips for a workaround yet: https://giters.com/django/channels_redis/issues/278", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 1020436713, "label": "Fix compatibility with Python 3.10"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/pull/1481#issuecomment-939078872", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/1481", "id": 939078872, "node_id": "IC_kwDOBm6k_c43-TTY", "user": {"value": 9599, "label": "simonw"}, "created_at": "2021-10-08T19:49:08Z", "updated_at": "2021-10-08T19:49:08Z", "author_association": "OWNER", "body": "Here's the code that raises that error: https://github.com/python/cpython/blob/bb3e0c240bc60fe08d332ff5955d54197f79751c/Lib/asyncio/locks.py#L219-L234\r\n\r\n```python\r\nclass Condition(_ContextManagerMixin, mixins._LoopBoundMixin):\r\n    \"\"\"Asynchronous equivalent to threading.Condition.\r\n    This class implements condition variable objects. A condition variable\r\n    allows one or more coroutines to wait until they are notified by another\r\n    coroutine.\r\n    A new Lock object is created and used as the underlying lock.\r\n    \"\"\"\r\n\r\n    def __init__(self, lock=None, *, loop=mixins._marker):\r\n        super().__init__(loop=loop)\r\n        if lock is None:\r\n            lock = Lock()\r\n        elif lock._loop is not self._get_loop():\r\n            raise ValueError(\"loop argument must agree with lock\")\r\n```\r\n", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 1020436713, "label": "Fix compatibility with Python 3.10"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/pull/1481#issuecomment-939079727", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/1481", "id": 939079727, "node_id": "IC_kwDOBm6k_c43-Tgv", "user": {"value": 9599, "label": "simonw"}, "created_at": "2021-10-08T19:50:52Z", "updated_at": "2021-10-08T19:50:52Z", "author_association": "OWNER", "body": "And here's the relevant Janus code: https://github.com/aio-libs/janus/blob/d7970f8b76bcac2e087067ca4575ac845e481874/janus/__init__.py#L24-L42\r\n\r\n```python\r\nclass Queue(Generic[T]):\r\n    def __init__(self, maxsize: int = 0) -> None:\r\n        self._loop = current_loop()\r\n        self._maxsize = maxsize\r\n\r\n        self._init(maxsize)\r\n\r\n        self._unfinished_tasks = 0\r\n\r\n        self._sync_mutex = threading.Lock()\r\n        self._sync_not_empty = threading.Condition(self._sync_mutex)\r\n        self._sync_not_full = threading.Condition(self._sync_mutex)\r\n        self._all_tasks_done = threading.Condition(self._sync_mutex)\r\n\r\n        self._async_mutex = asyncio.Lock()\r\n        # \"loop argument must agree with lock\" exception is raised here:\r\n        self._async_not_empty = asyncio.Condition(self._async_mutex)\r\n        self._async_not_full = asyncio.Condition(self._async_mutex)\r\n        self._finished = asyncio.Event()\r\n        self._finished.set()\r\n```", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 1020436713, "label": "Fix compatibility with Python 3.10"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/pull/1481#issuecomment-939100803", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/1481", "id": 939100803, "node_id": "IC_kwDOBm6k_c43-YqD", "user": {"value": 9599, "label": "simonw"}, "created_at": "2021-10-08T20:33:42Z", "updated_at": "2021-10-08T20:33:42Z", "author_association": "OWNER", "body": "There's a tiny chance this could be a bug in Python 3.10 itself - I filed an issue here: https://bugs.python.org/issue45416 - in which I said:\r\n\r\n> In Python 3.10 it is not possible to instantiate an asyncio.Condition that wraps an asyncio.Lock without raising a \"loop argument must agree with lock\" exception.\r\n> \r\n> This code raises that exception:\r\n> \r\n>     asyncio.Condition(asyncio.Lock())\r\n> \r\n> This worked in previous Python versions.\r\n> \r\n> Note that the error only occurs if an event loop is running. Here's a simple script that replicates the problem:\r\n> \r\n>     import asyncio\r\n> \r\n>     # This runs without an exception:\r\n>     print(asyncio.Condition(asyncio.Lock()))\r\n> \r\n>     # This does not work:\r\n>     async def example():\r\n>         print(asyncio.Condition(asyncio.Lock()))\r\n> \r\n>     # This raises \"ValueError: loop argument must agree with lock\":\r\n>     asyncio.run(example())", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 1020436713, "label": "Fix compatibility with Python 3.10"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/pull/1481#issuecomment-939180313", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/1481", "id": 939180313, "node_id": "IC_kwDOBm6k_c43-sEZ", "user": {"value": 9599, "label": "simonw"}, "created_at": "2021-10-08T23:41:39Z", "updated_at": "2021-10-08T23:41:39Z", "author_association": "OWNER", "body": "I submitted a PR to Janus with a workaround for this: https://github.com/aio-libs/janus/pull/359", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 1020436713, "label": "Fix compatibility with Python 3.10"}, "performed_via_github_app": null}