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gh-87790: support thousands separators for formatting fractional part of Decimal (#132202)

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Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Sergey B Kirpichev 2025-07-07 11:16:27 +03:00 • committed by GitHub
parent 0c3e3da195
commit 90a5b4402b
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3 changed files with 28 additions and 1 deletions
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13
Lib/test/test_decimal.py
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@ -1089,6 +1089,15 @@ class FormatTest:
('07_', '1234.56', '1_234.56'),
('_', '1.23456789', '1.23456789'),
('_%', '123.456789', '12_345.6789%'),
# and now for something completely different...
('.,', '1.23456789', '1.234,567,89'),
('._', '1.23456789', '1.234_567_89'),
('.6_f', '12345.23456789', '12345.234_568'),
(',._%', '123.456789', '12,345.678_9%'),
(',._e', '123456', '1.234_56e+5'),
(',.4_e', '123456', '1.234_6e+5'),
(',.3_e', '123456', '1.235e+5'),
(',._E', '123456', '1.234_56E+5'),
# negative zero: default behavior
('.1f', '-0', '-0.0'),
@ -1162,6 +1171,10 @@ class FormatTest:
# bytes format argument
self.assertRaises(TypeError, Decimal(1).__format__, b'-020')
# precision or fractional part separator should follow after dot
self.assertRaises(ValueError, format, Decimal(1), '.f')
self.assertRaises(ValueError, format, Decimal(1), '._6f')
def test_negative_zero_format_directed_rounding(self):
with self.decimal.localcontext() as ctx:
ctx.rounding = ROUND_CEILING