Add ABC ByteString which unifies bytes and bytearray (but not memoryview).
There's no ABC for "PEP 3118 style buffer API objects" because there's no
way to recognize these in Python (apart from trying to use memoryview()
on them).
Note that array.array really should be registered as a MutableSequence
but that would require importing it whenever collections is imported.
diff --git a/Lib/_abcoll.py b/Lib/_abcoll.py
index ec3e2f8..6363de9 100644
--- a/Lib/_abcoll.py
+++ b/Lib/_abcoll.py
@@ -16,6 +16,7 @@
"Mapping", "MutableMapping",
"MappingView", "KeysView", "ItemsView", "ValuesView",
"Sequence", "MutableSequence",
+ "ByteString",
]
### ONE-TRICK PONIES ###
@@ -489,8 +490,17 @@
Sequence.register(tuple)
Sequence.register(str)
-Sequence.register(bytes)
-Sequence.register(memoryview)
+
+
+class ByteString(Sequence):
+
+ """This unifies bytes and bytearray.
+
+ XXX Should add all their methods.
+ """
+
+ByteString.register(bytes)
+ByteString.register(bytearray)
class MutableSequence(Sequence):
@@ -531,4 +541,4 @@
self.extend(values)
MutableSequence.register(list)
-MutableSequence.register(bytes)
+MutableSequence.register(bytearray) # Multiply inheriting, see ByteString