Mark protocol members as abstract

srittau · srittau · commit 1e1ea4154471 · 2024-12-06T11:50:08.000+01:00
diff --git a/Lib/typing.py b/Lib/typing.py
@@ -2936,13 +2936,15 @@ class Reader[T](Iterable[T], Protocol):
 
     __slots__ = ()
 
+    @abstractmethod
     def read(self, size: int = ..., /) -> T:
         """Read data from the input stream and return it.
 
         If "size" is specified, at most "size" items (bytes/characters) will be
         read.
         """
 
+    @abstractmethod
     def readline(self, size: int = ..., /) -> T:
         """Read a line of data from the input stream and return it.
 
@@ -2960,6 +2962,7 @@ class Writer[T](Protocol):
 
     __slots__ = ()
 
+    @abstractmethod
     def write(self, data: T, /) -> int:
         """Write data to the output stream and return number of items written."""
 
