8000 gh-118761: substitute `re` import in `base64.b16decode` for a more efficient alternative by picnixz · Pull Request #128736 · python/cpython · GitHub
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gh-118761: substitute re import in base64.b16decode for a more efficient alternative #128736

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Merged
merged 8 commits into from
Jan 14, 2025
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gh-118761: substitute re import in base64.b16decode for a more efficient alternative #128736

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3a92fce
Improve import time of the `base64` module.
picnixz Jan 10, 2025
0b52712
blurb
picnixz Jan 10, 2025
d7b6253
Improve `base64.b16decode()` by a factor 10.
picnixz Jan 13, 2025
9e8fe5d
update NEWS
picnixz Jan 13, 2025
5be6178
Update Misc/NEWS.d/next/Library/2025-01-10-13-06-54.gh-issue-118761.f…
picnixz Jan 13, 2025
b36d915
add What's New entry
picnixz Jan 14, 2025
5562c81
Update Doc/whatsnew/3.14.rst
picnixz Jan 14, 2025
82d18d7
Update Misc/NEWS.d/next/Library/2025-01-10-13-06-54.gh-issue-118761.f…
picnixz Jan 14, 2025
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Improve base64.b16decode() by a factor 10. 
This entirely removes the needs to a regex.
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@picnixz
picnixz committed Jan 13, 2025
commit d7b6253759ead4e28ba664d0950a0c3aaeb0036a
4 changes: 1 addition & 3 deletions Lib/base64.py
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Expand Up @@ -280,12 +280,10 @@ def b16decode(s, casefold=False):
s is incorrectly padded or if there are non-alphabet characters present
in the input.
"""
import re

s = _bytes_from_decode_data(s)
if casefold:
s = s.upper()
if re.search(b'[^0-9A-F]', s):
if s.translate(None, delete=b'0123456789ABCDEF'):
raise binascii.Error('Non-base16 digit found')
return binascii.unhexlify(s)

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