Update `arguments` to `parameters` (Additional) [1] #20711

hyperkai · 2026-01-31T08:35:35Z

Fix: #20683

I changed arguments to parameters in the error messages of these constants below and I also changed some names of constants:

ARGUMENT_TYPE_EXPECTED       => PARAM_TYPE_EXPECTED
MISSING_OR_INVALID_SELF_TYPE
ELLIPSIS_WITH_OTHER_TYPEARGS => ELLIPSIS_WITH_OTHER_TYPEPARAMS
TYPE_SIGNATURE_TOO_MANY_ARGS => TYPE_SIGNATURE_TOO_MANY_PARAMS
TYPE_SIGNATURE_TOO_FEW_ARGS  => TYPE_SIGNATURE_TOO_FEW_PARAMS

hyperkai · 2026-02-01T16:33:53Z

mypy/message_registry.py

 # Self-type
 MISSING_OR_INVALID_SELF_TYPE: Final = ErrorMessage(
-    "Self argument missing for a non-static method (or an invalid type for self)"
+    "self parameter missing for a non-static method (or an invalid type for self)"


I also changed Self to self which is actually used as a parameter because It's more understandable:

class Cls: # ↓↓↓↓ def method(self) -> None: ...

It would be more consistent to use "self" parameter ... if using the lower-case version. I'd prefer it it was either quoted this way (we use double quotes) or unchanged from original, with capitalized 'Self'.

JukkaL

Thanks, this makes the terminology more consistent. Mostly looks good.

JukkaL · 2026-02-02T17:51:18Z

mypy/message_registry.py

 # Self-type
 MISSING_OR_INVALID_SELF_TYPE: Final = ErrorMessage(
-    "Self argument missing for a non-static method (or an invalid type for self)"
+    "self parameter missing for a non-static method (or an invalid type for self)"


It would be more consistent to use "self" parameter ... if using the lower-case version. I'd prefer it it was either quoted this way (we use double quotes) or unchanged from original, with capitalized 'Self'.

github-actions · 2026-02-02T18:39:05Z

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

colour (https://github.com/colour-science/colour)
- colour/characterisation/aces_it.py:975: error: Ellipses cannot accompany other argument types in function type signature  [syntax]
+ colour/characterisation/aces_it.py:975: error: Ellipses cannot accompany other parameter types in function type signature  [syntax]

cki-lib (https://gitlab.com/cki-project/cki-lib)
- cki_lib/metrics/server.py:8: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ cki_lib/metrics/server.py:8: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- cki_lib/s3bucket.py:18: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ cki_lib/s3bucket.py:18: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- cki_lib/kcidb/validate.py:49: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ cki_lib/kcidb/validate.py:49: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- cki_lib/kcidb/validate.py:137: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ cki_lib/kcidb/validate.py:137: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- cki_lib/cki_pipeline.py:199: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ cki_lib/cki_pipeline.py:199: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- cki_lib/messagequeue.py:269: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ cki_lib/messagequeue.py:269: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- cki_lib/messagequeue.py:338: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ cki_lib/messagequeue.py:338: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- cki_lib/messagequeue.py:389: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ cki_lib/messagequeue.py:389: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- cki_lib/messagequeue.py:447: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ cki_lib/messagequeue.py:447: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- tests/kcidb/test_checks.py:193: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ tests/kcidb/test_checks.py:193: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- tests/kcidb/test_checks.py:207: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ tests/kcidb/test_checks.py:207: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]

steam.py (https://github.com/Gobot1234/steam.py)
- steam/_const.py:73: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ steam/_const.py:73: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- steam/utils.py:167: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ steam/utils.py:167: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- steam/utils.py:173: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ steam/utils.py:173: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- steam/utils.py:221: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ steam/utils.py:221: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- steam/utils.py:227: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ steam/utils.py:227: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]

discord.py (https://github.com/Rapptz/discord.py)
- discord/client.py:1887: error: Self argument missing for a non-static method (or an invalid type for self)  [misc]
+ discord/client.py:1887: error: "self" parameter missing for a non-static method (or an invalid type for self)  [misc]
- discord/client.py:1897: error: Self argument missing for a non-static method (or an invalid type for self)  [misc]
+ discord/client.py:1897: error: "self" parameter missing for a non-static method (or an invalid type for self)  [misc]

pyodide (https://github.com/pyodide/pyodide)
- pyodide-build/pyodide_build/common.py:298: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/common.py:298: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/common.py:440: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/common.py:440: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/common.py:452: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/common.py:452: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/common.py:463: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/common.py:463: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/recipe/skeleton.py:237: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/recipe/skeleton.py:237: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/recipe/skeleton.py:246: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/recipe/skeleton.py:246: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/tests/test_cli_xbuildenv.py:29: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/tests/test_cli_xbuildenv.py:29: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/recipe/builder.py:781: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/recipe/builder.py:781: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/tests/recipe/test_graph_builder.py:133: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/tests/recipe/test_graph_builder.py:133: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/tests/recipe/test_graph_builder.py:161: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/tests/recipe/test_graph_builder.py:161: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- pyodide-build/pyodide_build/tests/test_cli.py:299: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyodide-build/pyodide_build/tests/test_cli.py:299: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]

pandera (https://github.com/pandera-dev/pandera)
- tests/pandas/test_model.py:47: error: Self argument missing for a non-static method (or an invalid type for self)  [misc]
+ tests/pandas/test_model.py:47: error: "self" parameter missing for a non-static method (or an invalid type for self)  [misc]
- tests/pandas/test_model.py:52: error: Self argument missing for a non-static method (or an invalid type for self)  [misc]
+ tests/pandas/test_model.py:52: error: "self" parameter missing for a non-static method (or an invalid type for self)  [misc]

artigraph (https://github.com/artigraph/artigraph)
- src/arti/internal/models.py:146: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ src/arti/internal/models.py:146: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]
- src/arti/internal/models.py:150: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ src/arti/internal/models.py:150: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]

pyppeteer (https://github.com/pyppeteer/pyppeteer)
- pyppeteer/launcher.py:222: error: Function is missing a type annotation for one or more arguments  [no-untyped-def]
+ pyppeteer/launcher.py:222: error: Function is missing a type annotation for one or more parameters  [no-untyped-def]

hyperkai added 4 commits January 31, 2026 17:07

Update error message for missing argument type annotation

58988cc

Update error messages for missing type annotations

416a76a

Fix type annotation error messages in tests

8c5d9cb

Fix type annotation error message in test

d29c114

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hyperkai added 4 commits February 2, 2026 01:10

Fix wording in error message for self parameter

a894621

Update check-classes.test

5343adb

Update check-selftype.test

a927084

Update check-overloading.test

1a7ac4f

hyperkai changed the title ~~Update arguments to parameters related to ARGUMENT_TYPE_EXPECTED~~ Update arguments to parameters related to ARGUMENT_TYPE_EXPECTED and MISSING_OR_INVALID_SELF_TYPE Feb 1, 2026

hyperkai commented Feb 1, 2026

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hyperkai added 18 commits February 2, 2026 01:54

Update message_registry.py

f5551e0

Update check-functions.test

62f2204

Update message_registry.py

79f7b11

Update check-fastparse.test

48c627c

Update parse-errors.test

f53a296

Update semanal-errors.test

9d0ae67

Update check-errorcodes.test

5458f4d

Update message_registry.py

5c8534b

Update check-fastparse.test

8afa534

Update parse-errors.test

1755885

Update check-columns.test

47764f4

Update fine-grained.test

30dca1e

Update semanal-errors.test

6b9bde7

Update check-functions.test

90e6954

Update check-errorcodes.test

4566bd1

Update message_registry.py

b9ab2a7

Update message_registry.py

605c8b9

Update fastparse.py

2d825fc

Update fastparse.py

14ac318

hyperkai changed the title ~~Update arguments to parameters related to ARGUMENT_TYPE_EXPECTED and MISSING_OR_INVALID_SELF_TYPE~~ Update arguments to parameters (Additional) 1 Feb 1, 2026

hyperkai changed the title ~~Update arguments to parameters (Additional) 1~~ Update arguments to parameters (Additional) [1] Feb 1, 2026

hyperkai added 3 commits February 2, 2026 02:41

Update checker.py

24f8fba

Update message_registry.py

cb7277a

Update message_registry.py

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JukkaL reviewed Feb 2, 2026

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hyperkai added 4 commits February 3, 2026 03:10

Update message_registry.py

db4ac33

Update check-classes.test

5cd99e6

Update check-selftype.test

1c7535f

Update check-overloading.test

c7e904c

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Update `arguments` to `parameters` (Additional) [1] #20711

Update `arguments` to `parameters` (Additional) [1] #20711

hyperkai commented Jan 31, 2026 •

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Update `arguments` to `parameters` (Additional) [1] #20711

Update `arguments` to `parameters` (Additional) [1] #20711

hyperkai commented Jan 31, 2026 •

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