https://github.com/python/cpython/commit/e10fe81cc6ae0979938eb3925139d56a74c620e3
commit: e10fe81cc6ae0979938eb3925139d56a74c620e3
branch: main
author: Sergey B Kirpichev <skirpic...@gmail.com>
committer: ambv <luk...@langa.pl>
date: 2025-04-15T12:38:03+02:00
summary:
gh-130664: support '_' (just as ',') in Decimal's formatting (#132155)
files:
A Misc/NEWS.d/next/Library/2025-04-06-14-34-29.gh-issue-130664.JF2r-U.rst
M Lib/_pydecimal.py
M Lib/test/test_decimal.py
diff --git a/Lib/_pydecimal.py b/Lib/_pydecimal.py
index ec036199331396..38dc7b70e0f6f0 100644
--- a/Lib/_pydecimal.py
+++ b/Lib/_pydecimal.py
@@ -6098,7 +6098,7 @@ def _convert_for_comparison(self, other,
equality_op=False):
(?P<alt>\#)?
(?P<zeropad>0)?
(?P<minimumwidth>(?!0)\d+)?
-(?P<thousands_sep>,)?
+(?P<thousands_sep>[,_])?
(?:\.(?P<precision>0|(?!0)\d+))?
(?P<type>[eEfFgGn%])?
\Z
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index 323a4d209ac946..fb14b80f7a8a2b 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -1083,6 +1083,11 @@ def test_formatting(self):
(',%', '123.456789', '12,345.6789%'),
(',e', '123456', '1.23456e+5'),
(',E', '123456', '1.23456E+5'),
+ # ... with '_' instead
+ ('_', '1234567', '1_234_567'),
+ ('07_', '1234.56', '1_234.56'),
+ ('_', '1.23456789', '1.23456789'),
+ ('_%', '123.456789', '12_345.6789%'),
# negative zero: default behavior
('.1f', '-0', '-0.0'),
diff --git
a/Misc/NEWS.d/next/Library/2025-04-06-14-34-29.gh-issue-130664.JF2r-U.rst
b/Misc/NEWS.d/next/Library/2025-04-06-14-34-29.gh-issue-130664.JF2r-U.rst
new file mode 100644
index 00000000000000..294a7e031b2806
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-04-06-14-34-29.gh-issue-130664.JF2r-U.rst
@@ -0,0 +1,2 @@
+Support the ``'_'`` digit separator in formatting of the integral part of
+:class:`~decimal.Decimal`'s. Patch by Sergey B Kirpichev.
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