Add precise values for enum members where possible (#11299)

Co-authored-by: Jelle Zijlstra <[email protected]>
Co-authored-by: Alex Waygood <[email protected]>

.flake8

@@ -8,6 +8,10 @@ extend-ignore = Y090
 per-file-ignores =
   # We should only need to noqa Y and F821 codes in .pyi files
   *.py: NQA
+  # Ignore Y052 in this file: there are loads of false positives
+  # due to the fact that flake8-pyi doesn't understand subclasses of `CoerciveEnum`
+  # as being enum classes
+  stubs/fpdf2/fpdf/enums.pyi: Y052
   # Generated protobuf files:
   # Y021: Include docstrings
   # Y023: Alias typing as typing_extensions

stdlib/asyncio/constants.pyi

@@ -15,6 +15,6 @@ if sys.version_info >= (3, 12):
     THREAD_JOIN_TIMEOUT: Literal[300]
 
 class _SendfileMode(enum.Enum):
-    UNSUPPORTED: int
-    TRY_NATIVE: int
-    FALLBACK: int
+    UNSUPPORTED = 1
+    TRY_NATIVE = 2
+    FALLBACK = 3

stdlib/asyncio/locks.pyi

@@ -101,10 +101,10 @@ class BoundedSemaphore(Semaphore): ...
 
 if sys.version_info >= (3, 11):
     class _BarrierState(enum.Enum):  # undocumented
-        FILLING: str
-        DRAINING: str
-        RESETTING: str
-        BROKEN: str
+        FILLING = "filling"
+        DRAINING = "draining"
+        RESETTING = "resetting"
+        BROKEN = "broken"
 
     class Barrier(_LoopBoundMixin):
         def __init__(self, parties: int) -> None: ...

stdlib/asyncio/sslproto.pyi

@@ -14,17 +14,17 @@ if sys.version_info >= (3, 11):
     SSLAgainErrors: tuple[type[ssl.SSLWantReadError], type[ssl.SSLSyscallError]]
 
     class SSLProtocolState(Enum):
-        UNWRAPPED: str
-        DO_HANDSHAKE: str
-        WRAPPED: str
-        FLUSHING: str
-        SHUTDOWN: str
+        UNWRAPPED = "UNWRAPPED"
+        DO_HANDSHAKE = "DO_HANDSHAKE"
+        WRAPPED = "WRAPPED"
+        FLUSHING = "FLUSHING"
+        SHUTDOWN = "SHUTDOWN"
 
     class AppProtocolState(Enum):
-        STATE_INIT: str
-        STATE_CON_MADE: str
-        STATE_EOF: str
-        STATE_CON_LOST: str
+        STATE_INIT = "STATE_INIT"
+        STATE_CON_MADE = "STATE_CON_MADE"
+        STATE_EOF = "STATE_EOF"
+        STATE_CON_LOST = "STATE_CON_LOST"
 
     def add_flowcontrol_defaults(high: int | None, low: int | None, kb: int) -> tuple[int, int]: ...
 

stdlib/http/__init__.pyi

@@ -15,65 +15,65 @@ class HTTPStatus(IntEnum):
     def phrase(self) -> str: ...
     @property
     def description(self) -> str: ...
-    CONTINUE: int
-    SWITCHING_PROTOCOLS: int
-    PROCESSING: int
-    OK: int
-    CREATED: int
-    ACCEPTED: int
-    NON_AUTHORITATIVE_INFORMATION: int
-    NO_CONTENT: int
-    RESET_CONTENT: int
-    PARTIAL_CONTENT: int
-    MULTI_STATUS: int
-    ALREADY_REPORTED: int
-    IM_USED: int
-    MULTIPLE_CHOICES: int
-    MOVED_PERMANENTLY: int
-    FOUND: int
-    SEE_OTHER: int
-    NOT_MODIFIED: int
-    USE_PROXY: int
-    TEMPORARY_REDIRECT: int
-    PERMANENT_REDIRECT: int
-    BAD_REQUEST: int
-    UNAUTHORIZED: int
-    PAYMENT_REQUIRED: int
-    FORBIDDEN: int
-    NOT_FOUND: int
-    METHOD_NOT_ALLOWED: int
-    NOT_ACCEPTABLE: int
-    PROXY_AUTHENTICATION_REQUIRED: int
-    REQUEST_TIMEOUT: int
-    CONFLICT: int
-    GONE: int
-    LENGTH_REQUIRED: int
-    PRECONDITION_FAILED: int
-    REQUEST_ENTITY_TOO_LARGE: int
-    REQUEST_URI_TOO_LONG: int
-    UNSUPPORTED_MEDIA_TYPE: int
-    REQUESTED_RANGE_NOT_SATISFIABLE: int
-    EXPECTATION_FAILED: int
-    UNPROCESSABLE_ENTITY: int
-    LOCKED: int
-    FAILED_DEPENDENCY: int
-    UPGRADE_REQUIRED: int
-    PRECONDITION_REQUIRED: int
-    TOO_MANY_REQUESTS: int
-    REQUEST_HEADER_FIELDS_TOO_LARGE: int
-    INTERNAL_SERVER_ERROR: int
-    NOT_IMPLEMENTED: int
-    BAD_GATEWAY: int
-    SERVICE_UNAVAILABLE: int
-    GATEWAY_TIMEOUT: int
-    HTTP_VERSION_NOT_SUPPORTED: int
-    VARIANT_ALSO_NEGOTIATES: int
-    INSUFFICIENT_STORAGE: int
-    LOOP_DETECTED: int
-    NOT_EXTENDED: int
-    NETWORK_AUTHENTICATION_REQUIRED: int
-    MISDIRECTED_REQUEST: int
-    UNAVAILABLE_FOR_LEGAL_REASONS: int
+    CONTINUE = 100
+    SWITCHING_PROTOCOLS = 101
+    PROCESSING = 102
+    OK = 200
+    CREATED = 201
+    ACCEPTED = 202
+    NON_AUTHORITATIVE_INFORMATION = 203
+    NO_CONTENT = 204
+    RESET_CONTENT = 205
+    PARTIAL_CONTENT = 206
+    MULTI_STATUS = 207
+    ALREADY_REPORTED = 208
+    IM_USED = 226
+    MULTIPLE_CHOICES = 300
+    MOVED_PERMANENTLY = 301
+    FOUND = 302
+    SEE_OTHER = 303
+    NOT_MODIFIED = 304
+    USE_PROXY = 305
+    TEMPORARY_REDIRECT = 307
+    PERMANENT_REDIRECT = 308
+    BAD_REQUEST = 400
+    UNAUTHORIZED = 401
+    PAYMENT_REQUIRED = 402
+    FORBIDDEN = 403
+    NOT_FOUND = 404
+    METHOD_NOT_ALLOWED = 405
+    NOT_ACCEPTABLE = 406
+    PROXY_AUTHENTICATION_REQUIRED = 407
+    REQUEST_TIMEOUT = 408
+    CONFLICT = 409
+    GONE = 410
+    LENGTH_REQUIRED = 411
+    PRECONDITION_FAILED = 412
+    REQUEST_ENTITY_TOO_LARGE = 413
+    REQUEST_URI_TOO_LONG = 414
+    UNSUPPORTED_MEDIA_TYPE = 415
+    REQUESTED_RANGE_NOT_SATISFIABLE = 416
+    EXPECTATION_FAILED = 417
+    UNPROCESSABLE_ENTITY = 422
+    LOCKED = 423
+    FAILED_DEPENDENCY = 424
+    UPGRADE_REQUIRED = 426
+    PRECONDITION_REQUIRED = 428
+    TOO_MANY_REQUESTS = 429
+    REQUEST_HEADER_FIELDS_TOO_LARGE = 431
+    INTERNAL_SERVER_ERROR = 500
+    NOT_IMPLEMENTED = 501
+    BAD_GATEWAY = 502
+    SERVICE_UNAVAILABLE = 503
+    GATEWAY_TIMEOUT = 504
+    HTTP_VERSION_NOT_SUPPORTED = 505
+    VARIANT_ALSO_NEGOTIATES = 506
+    INSUFFICIENT_STORAGE = 507
+    LOOP_DETECTED = 508
+    NOT_EXTENDED = 510
+    NETWORK_AUTHENTICATION_REQUIRED = 511
+    MISDIRECTED_REQUEST = 421
+    UNAVAILABLE_FOR_LEGAL_REASONS = 451
     if sys.version_info >= (3, 9):
         EARLY_HINTS: Literal[103]
         IM_A_TEAPOT: Literal[418]
@@ -94,12 +94,12 @@ if sys.version_info >= (3, 11):
     class HTTPMethod(StrEnum):
         @property
         def description(self) -> str: ...
-        CONNECT: str
-        DELETE: str
-        GET: str
-        HEAD: str
-        OPTIONS: str
-        PATCH: str
-        POST: str
-        PUT: str
-        TRACE: str
+        CONNECT = "CONNECT"
+        DELETE = "DELETE"
+        GET = "GET"
+        HEAD = "HEAD"
+        OPTIONS = "OPTIONS"
+        PATCH = "PATCH"
+        POST = "POST"
+        PUT = "PUT"
+        TRACE = "TRACE"

stdlib/inspect.pyi

@@ -347,11 +347,11 @@ if sys.version_info >= (3, 10):
 
 # The name is the same as the enum's name in CPython
 class _ParameterKind(enum.IntEnum):
-    POSITIONAL_ONLY: int
-    POSITIONAL_OR_KEYWORD: int
-    VAR_POSITIONAL: int
-    KEYWORD_ONLY: int
-    VAR_KEYWORD: int
+    POSITIONAL_ONLY = 0
+    POSITIONAL_OR_KEYWORD = 1
+    VAR_POSITIONAL = 2
+    KEYWORD_ONLY = 3
+    VAR_KEYWORD = 4
 
     @property
     def description(self) -> str: ...
@@ -611,22 +611,22 @@ if sys.version_info >= (3, 9):
 
 if sys.version_info >= (3, 12):
     class BufferFlags(enum.IntFlag):
-        SIMPLE: int
-        WRITABLE: int
-        FORMAT: int
-        ND: int
-        STRIDES: int
-        C_CONTIGUOUS: int
-        F_CONTIGUOUS: int
-        ANY_CONTIGUOUS: int
-        INDIRECT: int
-        CONTIG: int
-        CONTIG_RO: int
-        STRIDED: int
-        STRIDED_RO: int
-        RECORDS: int
-        RECORDS_RO: int
-        FULL: int
-        FULL_RO: int
-        READ: int
-        WRITE: int
+        SIMPLE = 0
+        WRITABLE = 1
+        FORMAT = 4
+        ND = 8
+        STRIDES = 24
+        C_CONTIGUOUS = 56
+        F_CONTIGUOUS = 88
+        ANY_CONTIGUOUS = 152
+        INDIRECT = 280
+        CONTIG = 9
+        CONTIG_RO = 8
+        STRIDED = 25
+        STRIDED_RO = 24
+        RECORDS = 29
+        RECORDS_RO = 28
+        FULL = 285
+        FULL_RO = 284
+        READ = 256
+        WRITE = 512

stdlib/plistlib.pyi

@@ -11,8 +11,8 @@ if sys.version_info < (3, 9):
     __all__ += ["readPlist", "writePlist", "readPlistFromBytes", "writePlistToBytes", "Data"]
 
 class PlistFormat(Enum):
-    FMT_XML: int
-    FMT_BINARY: int
+    FMT_XML = 1
+    FMT_BINARY = 2
 
 FMT_XML = PlistFormat.FMT_XML
 FMT_BINARY = PlistFormat.FMT_BINARY

stdlib/pstats.pyi

@@ -14,15 +14,15 @@ else:
 _Selector: TypeAlias = str | float | int
 
 class SortKey(StrEnum):
-    CALLS: str
-    CUMULATIVE: str
-    FILENAME: str
-    LINE: str
-    NAME: str
-    NFL: str
-    PCALLS: str
-    STDNAME: str
-    TIME: str
+    CALLS = "calls"
+    CUMULATIVE = "cumulative"
+    FILENAME = "filename"
+    LINE = "line"
+    NAME = "name"
+    NFL = "nfl"
+    PCALLS = "pcalls"
+    STDNAME = "stdname"
+    TIME = "time"
 
 if sys.version_info >= (3, 9):
     from dataclasses import dataclass

stdlib/py_compile.pyi

@@ -12,9 +12,9 @@ class PyCompileError(Exception):
     def __init__(self, exc_type: type[BaseException], exc_value: BaseException, file: str, msg: str = "") -> None: ...
 
 class PycInvalidationMode(enum.Enum):
-    TIMESTAMP: int
-    CHECKED_HASH: int
-    UNCHECKED_HASH: int
+    TIMESTAMP = 1
+    CHECKED_HASH = 2
+    UNCHECKED_HASH = 3
 
 def _get_default_invalidation_mode() -> PycInvalidationMode: ...
 def compile(