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gh-136282: Configparser: create unnamed sections via mapping protocol access #136313

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gh-136282: Configparser: create unnamed sections via mapping protocol access #136313

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3 changes: 2 additions & 1 deletion Lib/configparser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -794,7 +794,8 @@ def read_dict(self, dictionary, source='<dict>'):
"""
elements_added = set()
for section, keys in dictionary.items():
section = str(section)
if section is not UNNAMED_SECTION:
section = str(section)
try:
self.add_section(section)
except (DuplicateSectionError, ValueError):
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13 changes: 13 additions & 0 deletions Lib/test/test_configparser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2215,6 +2215,16 @@ def test_add_section(self):
cfg.add_section(configparser.UNNAMED_SECTION)
cfg.set(configparser.UNNAMED_SECTION, 'a', '1')
self.assertEqual('1', cfg[configparser.UNNAMED_SECTION]['a'])
output = io.StringIO()
cfg.write(output)
self.assertEqual(output.getvalue(), 'a = 1\n\n')

cfg = configparser.ConfigParser(allow_unnamed_section=True)
cfg[configparser.UNNAMED_SECTION] = {'a': '1'}
self.assertEqual('1', cfg[configparser.UNNAMED_SECTION]['a'])
output = io.StringIO()
cfg.write(output)
self.assertEqual(output.getvalue(), 'a = 1\n\n')

def test_disabled_error(self):
with self.assertRaises(configparser.MissingSectionHeaderError):
Expand All @@ -2223,6 +2233,9 @@ def test_disabled_error(self):
with self.assertRaises(configparser.UnnamedSectionDisabledError):
configparser.ConfigParser().add_section(configparser.UNNAMED_SECTION)

with self.assertRaises(configparser.UnnamedSectionDisabledError):
configparser.ConfigParser()[configparser.UNNAMED_SECTION] = {'a': '1'}

def test_multiple_configs(self):
cfg = configparser.ConfigParser(allow_unnamed_section=True)
cfg.read_string('a = 1')
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2025-07-05-08-30-07.gh-issue-136282.K3JKyD.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Add support for :const:`~configparser.UNNAMED_SECTION` when creating a
section via the mapping protocol access
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