bpo-33504: Migrate configparser from OrderedDict to dict. (#6819)
With 3.7+, dictionary are ordered by design. Configparser still uses
collections.OrderedDict, which is unnecessary. This updates the module
to use the standard dict implementation by default, and changes the
docs and tests to match.
diff --git a/Lib/configparser.py b/Lib/configparser.py
index a681d39..c88605f 100644
--- a/Lib/configparser.py
+++ b/Lib/configparser.py
@@ -139,7 +139,7 @@
"""
from collections.abc import MutableMapping
-from collections import OrderedDict as _default_dict, ChainMap as _ChainMap
+from collections import ChainMap as _ChainMap
import functools
import io
import itertools
@@ -157,6 +157,7 @@
"LegacyInterpolation", "SectionProxy", "ConverterMapping",
"DEFAULTSECT", "MAX_INTERPOLATION_DEPTH"]
+_default_dict = dict
DEFAULTSECT = "DEFAULT"
MAX_INTERPOLATION_DEPTH = 10