Add `bytearray.resize()` method

[cmaloney]

Feature or enhancement

Proposal:

Add bytearray.resize() which wraps PyByteArray_Resize

PyByteArray_Resize is part of the C Stable API and allows efficiently expanding a bytearray object's buffer in place (when possible / most efficient) without needing to have another object which can "hold" the data temporarily or needing to copy the data from one storage to a second. (ex. bytearray.extend(itertools.range(0, 20), a = bytearray(); a += b'temp'.

This can be somewhat emulated currently with appending a itertools.range / iterator that provides __length_hint__, but that still requires copying byte data out of the iterator. PyByteArray_Resize doesn't require setting / clearing the newly allocated space, just always ensures the data ends with a null byte \0.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-129559: Add bytearray.resize() #129560
• gh-129559: Remove extra . in bytearray.resize AC #140134
• [3.14] gh-129559: Remove extra dot in bytearray.resize AC (GH-140134) #140143
• gh-129559: Add missing bytearray.resize free threading test #141739
• [3.14] gh-129559: add bytearray.resize thread safety test for free-threading (GH-141739) #141835

[gpshead]

thanks!