From: Cody Maloney <cmaloney@users.noreply.github.com>
Date: Sat, 9 May 2026 21:39:01 +0000 (-0700)
Subject: gh-139871: Fix 3.15 bytearray.take_bytes example (#149520)
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=cc5cf14ae0a3665ba9d192cc4152c0a46a9dab2f;p=thirdparty%2FPython%2Fcpython.git

gh-139871: Fix 3.15 bytearray.take_bytes example (#149520)

Currently:
```python
buffer = bytearray(b'abc\ndef')
n = buffer.find(b'\n')
data = bytes(buffer[:n + 1])
del buffer[:n + 1]
assert data == b'abc'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
    assert data == b'abc'
           ^^^^^^^^^^^^^^
AssertionError
```

Adding in the `\n` makes the two match:

```python
buffer = bytearray(b'abc\ndef')
n = buffer.find(b'\n')
data = bytes(buffer[:n + 1])
del buffer[:n + 1]
assert data == b'abc\n'
assert buffer == bytearray(b'def')

buffer = bytearray(b'abc\ndef')
n = buffer.find(b'\n')
data = buffer.take_bytes(n + 1)
assert data == b'abc\n'
assert buffer == bytearray(b'def')
```
---

diff --git a/Doc/whatsnew/3.15.rst b/Doc/whatsnew/3.15.rst
index 0f7782ba1813..fb0755e8ffec 100644
--- a/Doc/whatsnew/3.15.rst
+++ b/Doc/whatsnew/3.15.rst
@@ -798,7 +798,7 @@ Other language changes
               n = buffer.find(b'\n')
               data = bytes(buffer[:n + 1])
               del buffer[:n + 1]
-              assert data == b'abc'
+              assert data == b'abc\n'
               assert buffer == bytearray(b'def')
 
         - .. code:: python