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gh-127096: Do not recreate unnamed section on every read in ConfigParser #127228

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Merged
merged 2 commits into from
Jan 26, 2025
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gh-127096: Do not recreate unnamed section on every read in ConfigParser #127228

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7683c96
Do not recreate unnamed section on every read in ConfigParser
PalmtopTiger Nov 24, 2024
ffa2ea9
Remove duplicate section creation code
PalmtopTiger Nov 24, 2024
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10 changes: 6 additions & 4 deletions Lib/configparser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1106,10 +1106,12 @@ def _handle_rest(self, st, line, fpname):
# a section header or option header?
if self._allow_unnamed_section and st.cursect is None:
st.sectname = UNNAMED_SECTION
st.cursect = self._dict()
self._sections[st.sectname] = st.cursect
self._proxies[st.sectname] = SectionProxy(self, st.sectname)
st.elements_added.add(st.sectname)
if st.sectname in self._sections:
st.cursect = self._sections[st.sectname]
else:
st.cursect = self._dict()
self._sections[st.sectname] = st.cursect
self._proxies[st.sectname] = SectionProxy(self, st.sectname)

st.indent_level = st.cur_indent_level
# is it a section header?
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9 changes: 9 additions & 0 deletions Lib/test/test_configparser.py
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Expand Up @@ -2174,6 +2174,15 @@ def test_disabled_error(self):
with self.assertRaises(configparser.UnnamedSectionDisabledError):
configparser.ConfigParser().add_section(configparser.UNNAMED_SECTION)

def test_multiple_configs(self):
cfg = configparser.ConfigParser(allow_unnamed_section=True)
cfg.read_string('a = 1')
cfg.read_string('b = 2')

self.assertEqual([configparser.UNNAMED_SECTION], cfg.sections())
self.assertEqual('1', cfg[configparser.UNNAMED_SECTION]['a'])
self.assertEqual('2', cfg[configparser.UNNAMED_SECTION]['b'])


class MiscTestCase(unittest.TestCase):
def test__all__(self):
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2024-11-24-22-06-42.gh-issue-127096.R7LLpQ.rst
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@@ -0,0 +1,2 @@
Do not recreate unnamed section on every read in
:class:`configparser.ConfigParser`. Patch by Andrey Efremov.
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