# HG changeset patch
# User pslacerda
# Date 1465678545 10800
#      Sat Jun 11 17:55:45 2016 -0300
# Node ID c9e5e7a1be1d64032792e0923c8339fb043f5eb4
# Parent  77604a2f019b1412aa6cea2ad1a493afc6781536
Add support to sectionless files in configparser

diff -r 77604a2f019b -r c9e5e7a1be1d Lib/configparser.py
--- a/Lib/configparser.py	Sat Jun 11 04:36:34 2016 -0400
+++ b/Lib/configparser.py	Sat Jun 11 17:55:45 2016 -0300
@@ -917,7 +917,8 @@
 
     def _write_section(self, fp, section_name, section_items, delimiter):
         """Write a single section to the specified `fp'."""
-        fp.write("[{}]\n".format(section_name))
+        if section_name:
+            fp.write("[{}]\n".format(section_name))
         for key, value in section_items:
             value = self._interpolation.before_write(self, section_name, key,
                                                      value)
@@ -1006,7 +1007,6 @@
         cursect = None                        # None, or a dictionary
         sectname = None
         optname = None
-        lineno = 0
         indent_level = 0
         e = None                              # None, or an exception
         for lineno, line in enumerate(fp, start=1):
@@ -1073,10 +1073,12 @@
                     # So sections can't start with a continuation line
                     optname = None
                 # no section header in the file?
-                elif cursect is None:
+                elif cursect is None and self.default_section is not None:
                     raise MissingSectionHeaderError(fpname, lineno, line)
                 # an option line?
                 else:
+                    if cursect is None:
+                        cursect = self._defaults
                     mo = self._optcre.match(value)
                     if mo:
                         optname, vi, optval = mo.group('option', 'vi', 'value')
diff -r 77604a2f019b -r c9e5e7a1be1d Lib/test/test_configparser.py
--- a/Lib/test/test_configparser.py	Sat Jun 11 04:36:34 2016 -0400
+++ b/Lib/test/test_configparser.py	Sat Jun 11 17:55:45 2016 -0300
@@ -1084,6 +1084,28 @@
         self.assertEqual(cf.get("global", "hosts allow"), "127.")
         self.assertEqual(cf.get("tmp", "echo command"), "cat %s; rm %s")
 
+
+class RawConfigParserTestUnnamedSection(CfgParserTestCaseClass,
+                                        unittest.TestCase):
+    config_class = configparser.RawConfigParser
+    default_section = None
+
+    def test_unnamed(self):
+        filename = support.findfile('cfgparser.4')
+        cf = self.fromstring(textwrap.dedent("""
+            PRETTY_NAME = sectionless configparser
+            FILE_NAME = Lib/configparser.py
+        """))
+        cf.write(open(filename, 'w'))
+
+        cf = self.newconfig()
+        cf.read(filename)
+
+        eq = self.assertEqual
+        eq(cf.get(None, 'PRETTY_NAME'), 'sectionless configparser')
+        eq(cf.get(None, 'FILE_NAME'), 'Lib/configparser.py')
+
+
 class ConfigParserTestCaseExtendedInterpolation(BasicTestCase, unittest.TestCase):
     config_class = configparser.ConfigParser
     interpolation = configparser.ExtendedInterpolation()