these parser attributes. The defaults are defined on the classes, so they may
be overridden by subclasses or by attribute assignment.
-.. attribute:: BOOLEAN_STATES
+.. attribute:: ConfigParser.BOOLEAN_STATES
By default when using :meth:`~ConfigParser.getboolean`, config parsers
consider the following values ``True``: ``'1'``, ``'yes'``, ``'true'``,
Other typical Boolean pairs include ``accept``/``reject`` or
``enabled``/``disabled``.
-.. method:: optionxform(option)
+.. method:: ConfigParser.optionxform(option)
This method transforms option names on every read, get, or set
operation. The default converts the name to lowercase. This also
>>> list(custom['Section2'].keys())
['AnotherKey']
-.. attribute:: SECTCRE
+.. attribute:: ConfigParser.SECTCRE
A compiled regular expression used to parse section headers. The default
matches ``[section]`` to the name ``"section"``. Whitespace is considered