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Describe the transform/untranform methods

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Raymond Hettinger 2010-12-05 04:04:21 +00:00
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Doc/whatsnew/3.2.rst
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@ -298,6 +298,25 @@ Other Language Changes
Some smaller changes made to the core Python language are:
* :class:`bytes` and :class:`str` now have two net methods, *tranform* and *untransform*.
These provided analogues to *encode* and *decode* but are used for general purpose
string-to-string and bytes-to-bytes transformations rather than Unicode codecs.
Along with the new methods, several non-unicode codecs been restored from Python 2.x
including *base64*, *bz2*, *hex*, *quopri*, *rot13*, *uu*, and *zlib*.
>>> t = b'which witch had which witches wrist watch'
>>> t.transform('quopri')
b'which=20witch=20had=20which=20witches=20wrist=20watch'
>>> short = t.transform('zlib_codec')
>>> len(t), len(short)
(41, 38)
>>> short.untransform('zlib_codec')
b'which witch had which witches wrist watch'
(From multiple contributers in :issue:`7475`.)
* The interpreter can now be started with a quiet option, ``-q``, to suppress
the copyright and version information in an interactive mode.