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bpo-35838: document optionxform must be idempotent (GH-12656)

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Inada Naoki 2019-04-02 18:08:46 +09:00 committed by GitHub
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Doc/library/configparser.rst
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@ -721,6 +721,12 @@ be overridden by subclasses or by attribute assignment.
>>> list(custom['Section2'].keys())
['AnotherKey']
.. note::
The optionxform function transforms option names to a canonical form.
This should be an idempotent function: if the name is already in
canonical form, it should be returned unchanged.
.. attribute:: ConfigParser.SECTCRE
A compiled regular expression used to parse section headers. The default