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Benjamin Peterson 2009-04-11 20:27:15 +00:00
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Doc/whatsnew/2.7.rst
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@ -88,22 +88,21 @@ Other Language Changes
Some smaller changes made to the core Python language are: Some smaller changes made to the core Python language are:
* The string :method:`format` method now supports automatic numbering * :meth:`str.format` method now supports automatic numbering of the replacement
of the replacement fields. This makes using :meth:`format` fields. This makes using :meth:`str.format` more closely resemble using
more closely resemble using ``%s`` formatting:: ``%s`` formatting::
>>> '{}:{}:{}'.format(2009, 04, 'Sunday') >>> '{}:{}:{}'.format(2009, 04, 'Sunday')
'2009:4:Sunday' '2009:4:Sunday'
>>> '{}:{}:{day}'.format(2009, 4, day='Sunday') >>> '{}:{}:{day}'.format(2009, 4, day='Sunday')
'2009:4:Sunday' '2009:4:Sunday'
The auto-numbering takes the fields from left to right, so the first The auto-numbering takes the fields from left to right, so the first ``{...}``
``{...}`` specifier will use the first argument to :meth:`format`, specifier will use the first argument to :meth:`str.format`, the next
the next specifier will use the next argument, and so on. You can't specifier will use the next argument, and so on. You can't mix auto-numbering
mix auto-numbering and explicit numbering -- either number all of and explicit numbering -- either number all of your specifier fields or none
your specifier fields or none of them -- but you can mix of them -- but you can mix auto-numbering and named fields, as in the second
auto-numbering and named fields, as in the second example above. example above. (Contributed by XXX; :issue`5237`.)
(Contributed by XXX; :issue`5237`.)
* The :func:`int` and :func:`long` types gained a ``bit_length`` * The :func:`int` and :func:`long` types gained a ``bit_length``
method that returns the number of bits necessary to represent method that returns the number of bits necessary to represent