gh-141968: use bytearray.take_bytes in encodings.idna (#141975)

Author: cmaloney

Lib/encodings/idna.py

@@ -226,7 +226,8 @@ def encode(self, input, errors='strict'):
                     offset + exc.end,
                     exc.reason,
                 )
-        return bytes(result+trailing_dot), len(input)
+        result += trailing_dot
+        return result.take_bytes(), len(input)
 
     def decode(self, input, errors='strict'):
 
@@ -311,7 +312,7 @@ def _buffer_encode(self, input, errors, final):
 
         result += trailing_dot
         size += len(trailing_dot)
-        return (bytes(result), size)
+        return (result.take_bytes(), size)
 
 class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
     def _buffer_decode(self, input, errors, final):

Misc/NEWS.d/next/Library/2025-11-25-23-35-07.gh-issue-141968.b3Gscp.rst

@@ -0,0 +1,2 @@
+Remove data copy from :mod:`encodings.idna` :meth:`~codecs.Codec.encode` and
+:meth:`~codecs.IncrementalEncoder.encode` by using :func:`bytearray.take_bytes`.