Document and export MISSING sentinel

discord/utils.py

@@ -96,6 +96,7 @@ __all__ = (
     'as_chunks',
     'format_dt',
     'set_target',
+    'MISSING',
 )
 
 DISCORD_EPOCH = 1420070400000
@@ -104,6 +105,8 @@ _log = logging.getLogger(__name__)
 
 
 class _MissingSentinel:
+    __slots__ = ()
+
     def __eq__(self, other):
         return False
 

docs/api.rst

@@ -1413,6 +1413,12 @@ Utility Functions
 
 .. autofunction:: discord.utils.set_target
 
+.. data:: MISSING
+
+    A type safe sentinel used in the library to represent something as missing. Used to distinguish from ``None`` values.
+
+    .. versionadded:: 2.0
+
 .. _discord-api-enums:
 
 Enumerations