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

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Cody Maloney 2025-11-26 07:44:25 -08:00 • committed by GitHub
parent 2ff8608b4d
commit 2c1fdf3592
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2 changed files with 4 additions and 2 deletions
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4
Lib/base64.py
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@ -193,7 +193,7 @@ def _b32encode(alphabet, s):
encoded[-3:] = b'===' encoded[-3:] = b'==='
elif leftover == 4: elif leftover == 4:
encoded[-1:] = b'=' encoded[-1:] = b'='
return bytes(encoded) return encoded.take_bytes()
def _b32decode(alphabet, s, casefold=False, map01=None): def _b32decode(alphabet, s, casefold=False, map01=None):
# Delay the initialization of the table to not waste memory # 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 last = acc.to_bytes(5) # big endian
leftover = (43 - 5 * padchars) // 8 # 1: 4, 3: 3, 4: 2, 6: 1 leftover = (43 - 5 * padchars) // 8 # 1: 4, 3: 3, 4: 2, 6: 1
decoded[-5:] = last[:leftover] decoded[-5:] = last[:leftover]
return bytes(decoded) return decoded.take_bytes()
def b32encode(s): def b32encode(s):

2
Misc/NEWS.d/next/Library/2025-11-25-22-54-07.gh-issue-141968.vg3AMJ.rst Normal file
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@ -0,0 +1,2 @@
Remove a data copy from :func:`base64.b32decode` and
:func:`base64.b32encode` by using :func:`bytearray.take_bytes`.