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Dedicated error code for explicit any by hauntsaninja · Pull Request #18398 · python/mypy · GitHub
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.. _code-narrowed-type-not-subtype:

Check that ``TypeIs`` narrows types [narrowed-type-not-subtype]
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this is on by default, so moving it to the correct page while i'm here

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github-actions bot commented Jan 1, 2025

Diff from mypy_primer, showing the effect of this PR on open source code:

trio (https://github.com/python-trio/trio)
+ src/trio/_core/_thread_cache.py:219: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_thread_cache.py:219: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_thread_cache.py:219: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_util.py:24: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_util.py:24: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_util.py:24: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_util.py:181: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_util.py:181: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_util.py:181: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_util.py:189: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_util.py:189: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_util.py:189: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_util.py:253: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_util.py:253: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_util.py:253: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_util.py:350: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_util.py:350: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_util.py:350: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_util.py:353: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_util.py:353: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_util.py:353: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_highlevel_serve_listeners.py:29: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_highlevel_serve_listeners.py:29: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_highlevel_serve_listeners.py:29: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_highlevel_serve_listeners.py:72: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_highlevel_serve_listeners.py:72: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_highlevel_serve_listeners.py:72: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_traps.py:108: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_traps.py:108: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_traps.py:108: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_socket.py:50: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_socket.py:50: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_socket.py:50: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_instrumentation.py:15: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_instrumentation.py:15: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_instrumentation.py:15: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_instrumentation.py:21: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_instrumentation.py:21: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_instrumentation.py:21: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_file_io.py:431: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_file_io.py:431: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_entry_queue.py:20: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_entry_queue.py:20: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_entry_queue.py:20: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_ssl.py:427: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_ssl.py:427: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_ssl.py:427: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_highlevel_open_tcp_stream.py:138: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_highlevel_open_tcp_stream.py:138: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_highlevel_open_tcp_stream.py:138: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1291: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1291: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1291: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1391: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1391: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1391: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1394: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1394: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1394: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1413: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1413: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1413: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1414: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1414: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1414: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1416: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1416: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1416: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1484: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1484: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1484: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1630: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1630: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1630: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1635: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1635: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1635: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1638: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1638: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1638: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1684: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1684: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:1684: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1693: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:1693: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:1693: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:2121: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:2121: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:2121: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_run.py:2423: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_run.py:2423: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_run.py:2423: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_threads.py:150: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_threads.py:150: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_threads.py:150: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_threads.py:151: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_threads.py:151: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_threads.py:151: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_threads.py:210: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_threads.py:210: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_threads.py:210: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_threads.py:211: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_threads.py:211: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_threads.py:211: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_threads.py:255: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_threads.py:255: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_threads.py:528: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_threads.py:528: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_threads.py:528: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_threads.py:573: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_threads.py:573: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_threads.py:573: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_path.py:34: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_path.py:34: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_path.py:34: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_path.py:187: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_path.py:187: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_path.py:197: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/testing/_fake_net.py:511: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/testing/_fake_net.py:511: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/testing/_fake_net.py:511: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_tests/test_subprocess.py:86: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_tests/test_subprocess.py:99: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_tests/test_subprocess.py:119: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_tests/test_subprocess.py:119: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_tests/test_subprocess.py:119: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_tests/test_ssl.py:385: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_tests/test_ssl.py:385: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_tests/test_ssl.py:385: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_tests/test_run.py:1662: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_tests/test_run.py:1662: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_tests/test_run.py:1662: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_tests/test_run.py:1700: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_tests/test_run.py:1700: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_tests/test_run.py:1700: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_tests/test_run.py:1706: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_tests/test_run.py:1706: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_tests/test_run.py:1706: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_core/_tests/test_ki.py:681: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_core/_tests/test_ki.py:681: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_core/_tests/test_ki.py:681: note: Error code "explicit-any" not covered by "type: ignore" comment
+ src/trio/_tests/test_threads.py:59: error: Unused "type: ignore" comment  [unused-ignore]
+ src/trio/_tests/test_threads.py:59: error: Explicit "Any" is not allowed  [explicit-any]
+ src/trio/_tests/test_threads.py:59: note: Error code "explicit-any" not covered by "type: ignore" comment

@A5rocks
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A5rocks commented Jan 1, 2025

I know the diff for trio looks bad, but we're already generally writing out explanations for this so this change is good:

https://github.com/python-trio/trio/blob/7084b564ea6780aa144cdb08fc85bf1cc9e703e0/src/trio/_util.py#L23-L24

-snip, I misread a note as an error-

@hauntsaninja
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Yup, I got here because I realised I could batch some type ignore thrash for trio here: #18397 (comment)

@hauntsaninja hauntsaninja merged commit b96a3f1 into python:master Jan 6, 2025
19 checks passed
@hauntsaninja hauntsaninja deleted the explicit-any branch January 6, 2025 20:21
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