From: Cody Maloney <cmaloney@users.noreply.github.com>
Date: Wed, 26 Nov 2025 15:44:25 +0000 (-0800)
Subject: gh-141968: Use `bytearray.take_bytes` in `base64` `_b32encode` and `_b32decode` ... 
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2c1fdf3592cee02f7d2e2f250f2fbd67ddea0a2c;p=thirdparty%2FPython%2Fcpython.git

gh-141968: Use `bytearray.take_bytes` in `base64` `_b32encode` and `_b32decode` (#141971)
---

diff --git a/Lib/base64.py b/Lib/base64.py
index f95132a42740..341bf8eaf189 100644
--- a/Lib/base64.py
+++ b/Lib/base64.py
@@ -193,7 +193,7 @@ def _b32encode(alphabet, s):
         encoded[-3:] = b'==='
     elif leftover == 4:
         encoded[-1:] = b'='
-    return bytes(encoded)
+    return encoded.take_bytes()
 
 def _b32decode(alphabet, s, casefold=False, map01=None):
     # Delay the initialization of the table to not waste memory
@@ -238,7 +238,7 @@ def _b32decode(alphabet, s, casefold=False, map01=None):
         last = acc.to_bytes(5)  # big endian
         leftover = (43 - 5 * padchars) // 8  # 1: 4, 3: 3, 4: 2, 6: 1
         decoded[-5:] = last[:leftover]
-    return bytes(decoded)
+    return decoded.take_bytes()
 
 
 def b32encode(s):
diff --git a/Misc/NEWS.d/next/Library/2025-11-25-22-54-07.gh-issue-141968.vg3AMJ.rst b/Misc/NEWS.d/next/Library/2025-11-25-22-54-07.gh-issue-141968.vg3AMJ.rst
new file mode 100644
index 000000000000..8492cb35d5bc
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-11-25-22-54-07.gh-issue-141968.vg3AMJ.rst
@@ -0,0 +1,2 @@
+Remove a data copy from :func:`base64.b32decode` and
+:func:`base64.b32encode` by using :func:`bytearray.take_bytes`.