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Metadata-Version: 1.2
Name: idna
Version: 2.8
Summary: Internationalized Domain Names in Applications (IDNA)
Home-page: https://github.com/kjd/idna
Author: Kim Davies
Author-email: kim@cynosure.com.au
License: BSD-like
Description: Internationalized Domain Names in Applications (IDNA)
        =====================================================
        
        Support for the Internationalised Domain Names in Applications
        (IDNA) protocol as specified in `RFC 5891 <http://tools.ietf.org/html/rfc5891>`_.
        This is the latest version of the protocol and is sometimes referred to as
        “IDNA 2008”.
        
        This library also provides support for Unicode Technical Standard 46,
        `Unicode IDNA Compatibility Processing <http://unicode.org/reports/tr46/>`_.
        
        This acts as a suitable replacement for the “encodings.idna” module that
        comes with the Python standard library, but only supports the
        old, deprecated IDNA specification (`RFC 3490 <http://tools.ietf.org/html/rfc3490>`_).
        
        Basic functions are simply executed:
        
        .. code-block:: pycon
        
            # Python 3
            >>> import idna
            >>> idna.encode('ドメイン.テスト')
            b'xn--eckwd4c7c.xn--zckzah'
            >>> print(idna.decode('xn--eckwd4c7c.xn--zckzah'))
            ドメイン.テスト
        
            # Python 2
            >>> import idna
            >>> idna.encode(u'ドメイン.テスト')
            'xn--eckwd4c7c.xn--zckzah'
            >>> print idna.decode('xn--eckwd4c7c.xn--zckzah')
            ドメイン.テスト
        
        Packages
        --------
        
        The latest tagged release version is published in the PyPI repository:
        
        .. image:: https://badge.fury.io/py/idna.svg
           :target: http://badge.fury.io/py/idna
        
        
        Installation
        ------------
        
        To install this library, you can use pip:
        
        .. code-block:: bash
        
            $ pip install idna
        
        Alternatively, you can install the package using the bundled setup script:
        
        .. code-block:: bash
        
            $ python setup.py install
        
        This library works with Python 2.7 and Python 3.4 or later.
        
        
        Usage
        -----
        
        For typical usage, the ``encode`` and ``decode`` functions will take a domain
        name argument and perform a conversion to A-labels or U-labels respectively.
        
        .. code-block:: pycon
        
            # Python 3
            >>> import idna
            >>> idna.encode('ドメイン.テスト')
            b'xn--eckwd4c7c.xn--zckzah'
            >>> print(idna.decode('xn--eckwd4c7c.xn--zckzah'))
            ドメイン.テスト
        
        You may use the codec encoding and decoding methods using the
        ``idna.codec`` module:
        
        .. code-block:: pycon
        
            # Python 2
            >>> import idna.codec
            >>> print u'домена.испытание'.encode('idna')
            xn--80ahd1agd.xn--80akhbyknj4f
            >>> print 'xn--80ahd1agd.xn--80akhbyknj4f'.decode('idna')
            домена.испытание
        
        Conversions can be applied at a per-label basis using the ``ulabel`` or ``alabel``
        functions if necessary:
        
        .. code-block:: pycon
        
            # Python 2
            >>> idna.alabel(u'测试')
            'xn--0zwm56d'
        
        Compatibility Mapping (UTS #46)
        +++++++++++++++++++++++++++++++
        
        As described in `RFC 5895 <http://tools.ietf.org/html/rfc5895>`_, the IDNA
        specification no longer normalizes input from different potential ways a user
        may input a domain name. This functionality, known as a “mapping”, is now
        considered by the specification to be a local user-interface issue distinct
        from IDNA conversion functionality.
        
        This library provides one such mapping, that was developed by the Unicode
        Consortium. Known as `Unicode IDNA Compatibility Processing <http://unicode.org/reports/tr46/>`_,
        it provides for both a regular mapping for typical applications, as well as
        a transitional mapping to help migrate from older IDNA 2003 applications.
        
        For example, “Königsgäßchen” is not a permissible label as *LATIN CAPITAL
        LETTER K* is not allowed (nor are capital letters in general). UTS 46 will
        convert this into lower case prior to applying the IDNA conversion.
        
        .. code-block:: pycon
        
            # Python 3
            >>> import idna
            >>> idna.encode(u'Königsgäßchen')
            ...
            idna.core.InvalidCodepoint: Codepoint U+004B at position 1 of 'Königsgäßchen' not allowed
            >>> idna.encode('Königsgäßchen', uts46=True)
            b'xn--knigsgchen-b4a3dun'
            >>> print(idna.decode('xn--knigsgchen-b4a3dun'))
            königsgäßchen
        
        Transitional processing provides conversions to help transition from the older
        2003 standard to the current standard. For example, in the original IDNA
        specification, the *LATIN SMALL LETTER SHARP S* (ß) was converted into two
        *LATIN SMALL LETTER S* (ss), whereas in the current IDNA specification this
        conversion is not performed.
        
        .. code-block:: pycon
        
            # Python 2
            >>> idna.encode(u'Königsgäßchen', uts46=True, transitional=True)
            'xn--knigsgsschen-lcb0w'
        
        Implementors should use transitional processing with caution, only in rare
        cases where conversion from legacy labels to current labels must be performed
        (i.e. IDNA implementations that pre-date 2008). For typical applications
        that just need to convert labels, transitional processing is unlikely to be
        beneficial and could produce unexpected incompatible results.
        
        ``encodings.idna`` Compatibility
        ++++++++++++++++++++++++++++++++
        
        Function calls from the Python built-in ``encodings.idna`` module are
        mapped to their IDNA 2008 equivalents using the ``idna.compat`` module.
        Simply substitute the ``import`` clause in your code to refer to the
        new module name.
        
        Exceptions
        ----------
        
        All errors raised during the conversion following the specification should
        raise an exception derived from the ``idna.IDNAError`` base class.
        
        More specific exceptions that may be generated as ``idna.IDNABidiError``
        when the error reflects an illegal combination of left-to-right and right-to-left
        characters in a label; ``idna.InvalidCodepoint`` when a specific codepoint is
        an illegal character in an IDN label (i.e. INVALID); and ``idna.InvalidCodepointContext``
        when the codepoint is illegal based on its positional context (i.e. it is CONTEXTO
        or CONTEXTJ but the contextual requirements are not satisfied.)
        
        Building and Diagnostics
        ------------------------
        
        The IDNA and UTS 46 functionality relies upon pre-calculated lookup tables for
        performance. These tables are derived from computing against eligibility criteria
        in the respective standards. These tables are computed using the command-line
        script ``tools/idna-data``.
        
        This tool will fetch relevant tables from the Unicode Consortium and perform the
        required calculations to identify eligibility. It has three main modes:
        
        * ``idna-data make-libdata``. Generates ``idnadata.py`` and ``uts46data.py``,
          the pre-calculated lookup tables using for IDNA and UTS 46 conversions. Implementors
          who wish to track this library against a different Unicode version may use this tool
          to manually generate a different version of the ``idnadata.py`` and ``uts46data.py``
          files.
        
        * ``idna-data make-table``. Generate a table of the IDNA disposition
          (e.g. PVALID, CONTEXTJ, CONTEXTO) in the format found in Appendix B.1 of RFC
          5892 and the pre-computed tables published by `IANA <http://iana.org/>`_.
        
        * ``idna-data U+0061``. Prints debugging output on the various properties
          associated with an individual Unicode codepoint (in this case, U+0061), that are
          used to assess the IDNA and UTS 46 status of a codepoint. This is helpful in debugging
          or analysis.
        
        The tool accepts a number of arguments, described using ``idna-data -h``. Most notably,
        the ``--version`` argument allows the specification of the version of Unicode to use
        in computing the table data. For example, ``idna-data --version 9.0.0 make-libdata``
        will generate library data against Unicode 9.0.0.
        
        Note that this script requires Python 3, but all generated library data will work
        in Python 2.7.
        
        
        Testing
        -------
        
        The library has a test suite based on each rule of the IDNA specification, as
        well as tests that are provided as part of the Unicode Technical Standard 46,
        `Unicode IDNA Compatibility Processing <http://unicode.org/reports/tr46/>`_.
        
        The tests are run automatically on each commit at Travis CI:
        
        .. image:: https://travis-ci.org/kjd/idna.svg?branch=master
           :target: https://travis-ci.org/kjd/idna
        
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: System Administrators
Classifier: License :: OSI Approved :: BSD License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Topic :: Internet :: Name Service (DNS)
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: Utilities
Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*

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