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svn+ssh://svn.python.org/python/branches/py3k ................ r74821 | georg.brandl | 2009-09-16 11:42:19 +0200 (Mi, 16 Sep 2009) | 1 line #6885: run python 3 as python3. ................ r74828 | georg.brandl | 2009-09-16 16:23:20 +0200 (Mi, 16 Sep 2009) | 1 line Use true booleans. ................ r74829 | georg.brandl | 2009-09-16 16:24:29 +0200 (Mi, 16 Sep 2009) | 1 line Small PEP8 correction. ................ r74830 | georg.brandl | 2009-09-16 16:36:22 +0200 (Mi, 16 Sep 2009) | 1 line Use true booleans. ................ r74831 | georg.brandl | 2009-09-16 17:54:04 +0200 (Mi, 16 Sep 2009) | 1 line Use true booleans and PEP8 for argdefaults. ................ r74833 | georg.brandl | 2009-09-16 17:58:14 +0200 (Mi, 16 Sep 2009) | 1 line Last round of adapting style of documenting argument default values. ................ r74835 | georg.brandl | 2009-09-16 18:00:31 +0200 (Mi, 16 Sep 2009) | 33 lines Merged revisions 74817-74820,74822-74824 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74817 | georg.brandl | 2009-09-16 11:05:11 +0200 (Mi, 16 Sep 2009) | 1 line Make deprecation notices as visible as warnings are right now. ........ r74818 | georg.brandl | 2009-09-16 11:23:04 +0200 (Mi, 16 Sep 2009) | 1 line #6880: add reference to classes section in exceptions section, which comes earlier. ........ r74819 | georg.brandl | 2009-09-16 11:24:57 +0200 (Mi, 16 Sep 2009) | 1 line #6876: fix base class constructor invocation in example. ........ r74820 | georg.brandl | 2009-09-16 11:30:48 +0200 (Mi, 16 Sep 2009) | 1 line #6891: comment out dead link to Unicode article. ........ r74822 | georg.brandl | 2009-09-16 12:12:06 +0200 (Mi, 16 Sep 2009) | 1 line #5621: refactor description of how class/instance attributes interact on a.x=a.x+1 or augassign. ........ r74823 | georg.brandl | 2009-09-16 15:06:22 +0200 (Mi, 16 Sep 2009) | 1 line Remove strange trailing commas. ........ r74824 | georg.brandl | 2009-09-16 15:11:06 +0200 (Mi, 16 Sep 2009) | 1 line #6892: fix optparse example involving help option. ........ ................
140 lines
4.1 KiB
ReStructuredText
140 lines
4.1 KiB
ReStructuredText
:mod:`stringprep` --- Internet String Preparation
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=================================================
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.. module:: stringprep
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:synopsis: String preparation, as per RFC 3453
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:deprecated:
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.. moduleauthor:: Martin v. Löwis <martin@v.loewis.de>
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.. sectionauthor:: Martin v. Löwis <martin@v.loewis.de>
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When identifying things (such as host names) in the internet, it is often
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necessary to compare such identifications for "equality". Exactly how this
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comparison is executed may depend on the application domain, e.g. whether it
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should be case-insensitive or not. It may be also necessary to restrict the
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possible identifications, to allow only identifications consisting of
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"printable" characters.
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:rfc:`3454` defines a procedure for "preparing" Unicode strings in internet
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protocols. Before passing strings onto the wire, they are processed with the
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preparation procedure, after which they have a certain normalized form. The RFC
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defines a set of tables, which can be combined into profiles. Each profile must
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define which tables it uses, and what other optional parts of the ``stringprep``
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procedure are part of the profile. One example of a ``stringprep`` profile is
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``nameprep``, which is used for internationalized domain names.
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The module :mod:`stringprep` only exposes the tables from RFC 3454. As these
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tables would be very large to represent them as dictionaries or lists, the
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module uses the Unicode character database internally. The module source code
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itself was generated using the ``mkstringprep.py`` utility.
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As a result, these tables are exposed as functions, not as data structures.
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There are two kinds of tables in the RFC: sets and mappings. For a set,
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:mod:`stringprep` provides the "characteristic function", i.e. a function that
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returns true if the parameter is part of the set. For mappings, it provides the
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mapping function: given the key, it returns the associated value. Below is a
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list of all functions available in the module.
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.. function:: in_table_a1(code)
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Determine whether *code* is in tableA.1 (Unassigned code points in Unicode 3.2).
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.. function:: in_table_b1(code)
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Determine whether *code* is in tableB.1 (Commonly mapped to nothing).
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.. function:: map_table_b2(code)
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Return the mapped value for *code* according to tableB.2 (Mapping for
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case-folding used with NFKC).
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.. function:: map_table_b3(code)
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Return the mapped value for *code* according to tableB.3 (Mapping for
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case-folding used with no normalization).
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.. function:: in_table_c11(code)
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Determine whether *code* is in tableC.1.1 (ASCII space characters).
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.. function:: in_table_c12(code)
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Determine whether *code* is in tableC.1.2 (Non-ASCII space characters).
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.. function:: in_table_c11_c12(code)
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Determine whether *code* is in tableC.1 (Space characters, union of C.1.1 and
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C.1.2).
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.. function:: in_table_c21(code)
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Determine whether *code* is in tableC.2.1 (ASCII control characters).
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.. function:: in_table_c22(code)
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Determine whether *code* is in tableC.2.2 (Non-ASCII control characters).
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.. function:: in_table_c21_c22(code)
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Determine whether *code* is in tableC.2 (Control characters, union of C.2.1 and
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C.2.2).
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.. function:: in_table_c3(code)
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Determine whether *code* is in tableC.3 (Private use).
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.. function:: in_table_c4(code)
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Determine whether *code* is in tableC.4 (Non-character code points).
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.. function:: in_table_c5(code)
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Determine whether *code* is in tableC.5 (Surrogate codes).
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.. function:: in_table_c6(code)
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Determine whether *code* is in tableC.6 (Inappropriate for plain text).
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.. function:: in_table_c7(code)
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Determine whether *code* is in tableC.7 (Inappropriate for canonical
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representation).
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.. function:: in_table_c8(code)
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Determine whether *code* is in tableC.8 (Change display properties or are
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deprecated).
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.. function:: in_table_c9(code)
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Determine whether *code* is in tableC.9 (Tagging characters).
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.. function:: in_table_d1(code)
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Determine whether *code* is in tableD.1 (Characters with bidirectional property
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"R" or "AL").
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.. function:: in_table_d2(code)
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Determine whether *code* is in tableD.2 (Characters with bidirectional property
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"L").
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