GeezerVison is showing github.com — gh-139871: Fix 3.15 bytearray.take_bytes example by cmaloney · Pull Request #149520 · python/cpython
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cmaloney
commented
May 7, 2026
•
edited by bedevere-app
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Currently:
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 newline both match:
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')
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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')
```
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Thanks @cmaloney for the PR, and @JelleZijlstra for merging it 🌮🎉.. I'm working now to backport this PR to: 3.15.
🐍🍒⛏🤖
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JelleZijlstra
pushed a commit
that referenced
this pull request
May 9, 2026
…149622)
gh-139871: Fix 3.15 bytearray.take_bytes example (GH-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')
```
(cherry picked from commit cc5cf14)
Co-authored-by: Cody Maloney <[email protected]>
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AA-Turner
Awaiting requested review from AA-Turner
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