Major fixes and new features
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263
venv/lib/python3.12/site-packages/mypy/errorcodes.py
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263
venv/lib/python3.12/site-packages/mypy/errorcodes.py
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"""Classification of possible errors mypy can detect.
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These can be used for filtering specific errors.
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"""
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from __future__ import annotations
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from collections import defaultdict
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from typing import Final
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from mypy_extensions import mypyc_attr
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error_codes: dict[str, ErrorCode] = {}
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sub_code_map: dict[str, set[str]] = defaultdict(set)
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@mypyc_attr(allow_interpreted_subclasses=True)
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class ErrorCode:
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def __init__(
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self,
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code: str,
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description: str,
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category: str,
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default_enabled: bool = True,
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sub_code_of: ErrorCode | None = None,
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) -> None:
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self.code = code
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self.description = description
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self.category = category
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self.default_enabled = default_enabled
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self.sub_code_of = sub_code_of
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if sub_code_of is not None:
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assert sub_code_of.sub_code_of is None, "Nested subcategories are not supported"
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sub_code_map[sub_code_of.code].add(code)
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error_codes[code] = self
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def __str__(self) -> str:
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return f"<ErrorCode {self.code}>"
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def __eq__(self, other: object) -> bool:
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if not isinstance(other, ErrorCode):
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return False
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return self.code == other.code
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def __hash__(self) -> int:
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return hash((self.code,))
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ATTR_DEFINED: Final = ErrorCode("attr-defined", "Check that attribute exists", "General")
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NAME_DEFINED: Final = ErrorCode("name-defined", "Check that name is defined", "General")
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CALL_ARG: Final[ErrorCode] = ErrorCode(
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"call-arg", "Check number, names and kinds of arguments in calls", "General"
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)
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ARG_TYPE: Final = ErrorCode("arg-type", "Check argument types in calls", "General")
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CALL_OVERLOAD: Final = ErrorCode(
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"call-overload", "Check that an overload variant matches arguments", "General"
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)
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VALID_TYPE: Final[ErrorCode] = ErrorCode(
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"valid-type", "Check that type (annotation) is valid", "General"
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)
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VAR_ANNOTATED: Final = ErrorCode(
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"var-annotated", "Require variable annotation if type can't be inferred", "General"
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)
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OVERRIDE: Final = ErrorCode(
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"override", "Check that method override is compatible with base class", "General"
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)
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RETURN: Final[ErrorCode] = ErrorCode(
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"return", "Check that function always returns a value", "General"
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)
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RETURN_VALUE: Final[ErrorCode] = ErrorCode(
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"return-value", "Check that return value is compatible with signature", "General"
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)
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ASSIGNMENT: Final[ErrorCode] = ErrorCode(
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"assignment", "Check that assigned value is compatible with target", "General"
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)
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METHOD_ASSIGN: Final[ErrorCode] = ErrorCode(
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"method-assign",
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"Check that assignment target is not a method",
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"General",
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sub_code_of=ASSIGNMENT,
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)
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TYPE_ARG: Final = ErrorCode("type-arg", "Check that generic type arguments are present", "General")
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TYPE_VAR: Final = ErrorCode("type-var", "Check that type variable values are valid", "General")
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UNION_ATTR: Final = ErrorCode(
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"union-attr", "Check that attribute exists in each item of a union", "General"
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)
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INDEX: Final = ErrorCode("index", "Check indexing operations", "General")
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OPERATOR: Final = ErrorCode("operator", "Check that operator is valid for operands", "General")
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LIST_ITEM: Final = ErrorCode(
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"list-item", "Check list items in a list expression [item, ...]", "General"
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)
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DICT_ITEM: Final = ErrorCode(
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"dict-item", "Check dict items in a dict expression {key: value, ...}", "General"
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)
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TYPEDDICT_ITEM: Final = ErrorCode(
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"typeddict-item", "Check items when constructing TypedDict", "General"
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)
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TYPEDDICT_UNKNOWN_KEY: Final = ErrorCode(
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"typeddict-unknown-key",
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"Check unknown keys when constructing TypedDict",
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"General",
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sub_code_of=TYPEDDICT_ITEM,
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)
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HAS_TYPE: Final = ErrorCode(
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"has-type", "Check that type of reference can be determined", "General"
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)
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IMPORT: Final = ErrorCode(
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"import", "Require that imported module can be found or has stubs", "General"
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)
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IMPORT_NOT_FOUND: Final = ErrorCode(
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"import-not-found", "Require that imported module can be found", "General", sub_code_of=IMPORT
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)
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IMPORT_UNTYPED: Final = ErrorCode(
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"import-untyped", "Require that imported module has stubs", "General", sub_code_of=IMPORT
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)
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NO_REDEF: Final = ErrorCode("no-redef", "Check that each name is defined once", "General")
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FUNC_RETURNS_VALUE: Final = ErrorCode(
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"func-returns-value", "Check that called function returns a value in value context", "General"
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)
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ABSTRACT: Final = ErrorCode(
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"abstract", "Prevent instantiation of classes with abstract attributes", "General"
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)
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TYPE_ABSTRACT: Final = ErrorCode(
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"type-abstract", "Require only concrete classes where Type[...] is expected", "General"
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)
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VALID_NEWTYPE: Final = ErrorCode(
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"valid-newtype", "Check that argument 2 to NewType is valid", "General"
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)
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STRING_FORMATTING: Final = ErrorCode(
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"str-format", "Check that string formatting/interpolation is type-safe", "General"
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)
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STR_BYTES_PY3: Final = ErrorCode(
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"str-bytes-safe", "Warn about implicit coercions related to bytes and string types", "General"
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)
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EXIT_RETURN: Final = ErrorCode(
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"exit-return", "Warn about too general return type for '__exit__'", "General"
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)
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LITERAL_REQ: Final = ErrorCode("literal-required", "Check that value is a literal", "General")
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UNUSED_COROUTINE: Final = ErrorCode(
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"unused-coroutine", "Ensure that all coroutines are used", "General"
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)
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# TODO: why do we need the explicit type here? Without it mypyc CI builds fail with
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# mypy/message_registry.py:37: error: Cannot determine type of "EMPTY_BODY" [has-type]
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EMPTY_BODY: Final[ErrorCode] = ErrorCode(
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"empty-body",
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"A dedicated error code to opt out return errors for empty/trivial bodies",
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"General",
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)
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SAFE_SUPER: Final = ErrorCode(
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"safe-super", "Warn about calls to abstract methods with empty/trivial bodies", "General"
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)
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TOP_LEVEL_AWAIT: Final = ErrorCode(
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"top-level-await", "Warn about top level await expressions", "General"
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)
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AWAIT_NOT_ASYNC: Final = ErrorCode(
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"await-not-async", 'Warn about "await" outside coroutine ("async def")', "General"
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)
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# These error codes aren't enabled by default.
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NO_UNTYPED_DEF: Final[ErrorCode] = ErrorCode(
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"no-untyped-def", "Check that every function has an annotation", "General"
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)
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NO_UNTYPED_CALL: Final = ErrorCode(
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"no-untyped-call",
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"Disallow calling functions without type annotations from annotated functions",
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"General",
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)
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REDUNDANT_CAST: Final = ErrorCode(
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"redundant-cast", "Check that cast changes type of expression", "General"
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)
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ASSERT_TYPE: Final = ErrorCode("assert-type", "Check that assert_type() call succeeds", "General")
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COMPARISON_OVERLAP: Final = ErrorCode(
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"comparison-overlap", "Check that types in comparisons and 'in' expressions overlap", "General"
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)
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NO_ANY_UNIMPORTED: Final = ErrorCode(
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"no-any-unimported", 'Reject "Any" types from unfollowed imports', "General"
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)
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NO_ANY_RETURN: Final = ErrorCode(
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"no-any-return",
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'Reject returning value with "Any" type if return type is not "Any"',
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"General",
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)
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UNREACHABLE: Final = ErrorCode(
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"unreachable", "Warn about unreachable statements or expressions", "General"
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)
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ANNOTATION_UNCHECKED = ErrorCode(
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"annotation-unchecked", "Notify about type annotations in unchecked functions", "General"
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)
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POSSIBLY_UNDEFINED: Final[ErrorCode] = ErrorCode(
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"possibly-undefined",
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"Warn about variables that are defined only in some execution paths",
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"General",
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default_enabled=False,
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)
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REDUNDANT_EXPR: Final = ErrorCode(
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"redundant-expr", "Warn about redundant expressions", "General", default_enabled=False
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)
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TRUTHY_BOOL: Final[ErrorCode] = ErrorCode(
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"truthy-bool",
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"Warn about expressions that could always evaluate to true in boolean contexts",
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"General",
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default_enabled=False,
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)
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TRUTHY_FUNCTION: Final[ErrorCode] = ErrorCode(
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"truthy-function",
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"Warn about function that always evaluate to true in boolean contexts",
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"General",
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)
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TRUTHY_ITERABLE: Final[ErrorCode] = ErrorCode(
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"truthy-iterable",
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"Warn about Iterable expressions that could always evaluate to true in boolean contexts",
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"General",
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default_enabled=False,
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)
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NAME_MATCH: Final = ErrorCode(
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"name-match", "Check that type definition has consistent naming", "General"
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)
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NO_OVERLOAD_IMPL: Final = ErrorCode(
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"no-overload-impl",
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"Check that overloaded functions outside stub files have an implementation",
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"General",
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)
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IGNORE_WITHOUT_CODE: Final = ErrorCode(
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"ignore-without-code",
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"Warn about '# type: ignore' comments which do not have error codes",
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"General",
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default_enabled=False,
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)
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UNUSED_AWAITABLE: Final = ErrorCode(
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"unused-awaitable",
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"Ensure that all awaitable values are used",
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"General",
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default_enabled=False,
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)
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REDUNDANT_SELF_TYPE = ErrorCode(
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"redundant-self",
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"Warn about redundant Self type annotations on method first argument",
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"General",
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default_enabled=False,
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)
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USED_BEFORE_DEF: Final[ErrorCode] = ErrorCode(
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"used-before-def", "Warn about variables that are used before they are defined", "General"
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)
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UNUSED_IGNORE: Final = ErrorCode(
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"unused-ignore", "Ensure that all type ignores are used", "General", default_enabled=False
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)
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EXPLICIT_OVERRIDE_REQUIRED: Final = ErrorCode(
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"explicit-override",
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"Require @override decorator if method is overriding a base class method",
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"General",
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default_enabled=False,
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)
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# Syntax errors are often blocking.
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SYNTAX: Final[ErrorCode] = ErrorCode("syntax", "Report syntax errors", "General")
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# This is an internal marker code for a whole-file ignore. It is not intended to
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# be user-visible.
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FILE: Final = ErrorCode("file", "Internal marker for a whole file being ignored", "General")
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del error_codes[FILE.code]
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# This is a catch-all for remaining uncategorized errors.
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MISC: Final = ErrorCode("misc", "Miscellaneous other checks", "General")
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