https://github.com/python/cpython/commit/ef8eeca9d8d464cff0e7bc5c428e9b8ba4936962
commit: ef8eeca9d8d464cff0e7bc5c428e9b8ba4936962
branch: main
author: Andrey Efremov <du...@yandex.ru>
committer: encukou <encu...@gmail.com>
date: 2025-02-17T14:24:57+01:00
summary:
gh-129678: ConfigParser: do not write an empty unnamed section (GH-129679)
Co-authored-by: Petr Viktorin <encu...@gmail.com>
files:
A Misc/NEWS.d/next/Library/2025-02-05-15-17-31.gh-issue-129678.GIUrmV.rst
M Lib/configparser.py
M Lib/test/test_configparser.py
diff --git a/Lib/configparser.py b/Lib/configparser.py
index 9dc4fa515cfcbe..9ff52e03c2c458 100644
--- a/Lib/configparser.py
+++ b/Lib/configparser.py
@@ -959,7 +959,7 @@ def write(self, fp, space_around_delimiters=True):
if self._defaults:
self._write_section(fp, self.default_section,
self._defaults.items(), d)
- if UNNAMED_SECTION in self._sections:
+ if UNNAMED_SECTION in self._sections and
self._sections[UNNAMED_SECTION]:
self._write_section(fp, UNNAMED_SECTION,
self._sections[UNNAMED_SECTION].items(), d, unnamed=True)
for section in self._sections:
diff --git a/Lib/test/test_configparser.py b/Lib/test/test_configparser.py
index bde805eb741c33..c2c82ebe6a87aa 100644
--- a/Lib/test/test_configparser.py
+++ b/Lib/test/test_configparser.py
@@ -2161,6 +2161,14 @@ def test_no_section(self):
self.assertEqual('1', cfg2[configparser.UNNAMED_SECTION]['a'])
self.assertEqual('2', cfg2[configparser.UNNAMED_SECTION]['b'])
+ def test_empty_unnamed_section(self):
+ cfg = configparser.ConfigParser(allow_unnamed_section=True)
+ cfg.add_section(configparser.UNNAMED_SECTION)
+ cfg.add_section('section')
+ output = io.StringIO()
+ cfg.write(output)
+ self.assertEqual(output.getvalue(), '[section]\n\n')
+
def test_add_section(self):
cfg = configparser.ConfigParser(allow_unnamed_section=True)
cfg.add_section(configparser.UNNAMED_SECTION)
diff --git
a/Misc/NEWS.d/next/Library/2025-02-05-15-17-31.gh-issue-129678.GIUrmV.rst
b/Misc/NEWS.d/next/Library/2025-02-05-15-17-31.gh-issue-129678.GIUrmV.rst
new file mode 100644
index 00000000000000..5c91a0f99e88bd
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-02-05-15-17-31.gh-issue-129678.GIUrmV.rst
@@ -0,0 +1 @@
+:class:`configparser.ConfigParser`: do not write an empty unnamed section
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