python · ambv · Jul 13, 2021 · Jul 13, 2021
diff --git a/Lib/configparser.py b/Lib/configparser.py
@@ -563,7 +563,7 @@ class RawConfigParser(MutableMapping):
    # Regular expressions for parsing section headers and options
    _SECT_TMPL = r"""
        \[                                 # [
-        (?P<header>[^]]+)                  # very permissive!
+        (?P<header>.+)                     # very permissive!
        \]                                 # ]
        """
    _OPT_TMPL = r"""

diff --git a/Lib/test/test_configparser.py b/Lib/test/test_configparser.py
@@ -79,6 +79,7 @@ def basic_test(self, cf):
             'Spacey Bar',
             'Spacey Bar From The Beginning',
             'Types',
+             'This One Has A ] In It',
             ]

        if self.allow_no_value:
@@ -130,6 +131,7 @@ def basic_test(self, cf):
        eq(cf.get('Types', 'float'), "0.44")
        eq(cf.getboolean('Types', 'boolean'), False)
        eq(cf.get('Types', '123'), 'strange but acceptable')
+        eq(cf.get('This One Has A ] In It', 'forks'), 'spoons')
        if self.allow_no_value:
            eq(cf.get('NoValue', 'option-without-value'), None)

@@ -320,6 +322,8 @@ def test_basic(self):
 float {0[0]} 0.44
 boolean {0[0]} NO
 123 {0[1]} strange but acceptable
+[This One Has A ] In It]
+  forks {0[0]} spoons
 """.format(self.delimiters, self.comment_prefixes)
        if self.allow_no_value:
            config_string += (
@@ -394,6 +398,9 @@ def test_basic_from_dict(self):
                "boolean": False,
                123: "strange but acceptable",
            },
+            "This One Has A ] In It": {
+                "forks": "spoons"
+            },
        }
        if self.allow_no_value:
            config.update({

diff --git a/Misc/NEWS.d/next/Library/2019-11-12-18-59-33.bpo-38741.W7IYkq.rst b/Misc/NEWS.d/next/Library/2019-11-12-18-59-33.bpo-38741.W7IYkq.rst
@@ -0,0 +1 @@
+:mod:`configparser`: using ']' inside a section header will no longer cut the section name short at the ']'
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		:mod:`configparser`: using ']' inside a section header will no longer cut the section name short at the ']'