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[3.14] GH-132661: Add `string.templatelib.convert()` (GH-135217) (#136671)

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GH-132661: Add ``string.templatelib.convert()`` (GH-135217)
(cherry picked from commit 5b969fd645)

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
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Miss Islington (bot) 2025-07-15 12:22:24 +02:00 • committed by GitHub
parent 115477399b
commit 2ae0eb1a87
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2 changed files with 33 additions and 6 deletions
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22
Lib/test/test_string/test_templatelib.py
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@ -1,7 +1,7 @@
import pickle
import unittest
from collections.abc import Iterator, Iterable
from string.templatelib import Template, Interpolation
from string.templatelib import Template, Interpolation, convert
from test.test_string._support import TStringBaseCase, fstring
@ -169,5 +169,25 @@ def test_exhausted(self):
self.assertRaises(StopIteration, next, template_iter)
class TestFunctions(unittest.TestCase):
def test_convert(self):
from fractions import Fraction
for obj in ('Café', None, 3.14, Fraction(1, 2)):
with self.subTest(f'{obj=}'):
self.assertEqual(convert(obj, None), obj)
self.assertEqual(convert(obj, 's'), str(obj))
self.assertEqual(convert(obj, 'r'), repr(obj))
self.assertEqual(convert(obj, 'a'), ascii(obj))
# Invalid conversion specifier
with self.assertRaises(ValueError):
convert(obj, 'z')
with self.assertRaises(ValueError):
convert(obj, 1)
with self.assertRaises(ValueError):
convert(obj, object())
if __name__ == '__main__':
unittest.main()