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        "author": "Mart\u00edn Gait\u00e1n",
        "author_email": "gaitan@gmail.com",
        "bugtrack_url": null,
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            "Development Status :: 4 - Beta",
            "Framework :: Django",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: BSD License",
            "Natural Language :: English",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 2.5",
            "Programming Language :: Python :: 2.6",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.3",
            "Programming Language :: Python :: 3.4"
        ],
        "description": "====================================\n``one``, the missing Python function\n====================================\n\n.. image:: https://pypip.in/d/one/badge.png\n        :target: https://pypi.python.org/pypi/one\n\n.. image:: https://travis-ci.org/mgaitan/one.svg\n    :target: https://travis-ci.org/mgaitan/one\n\n\nNot ``all`` nor ``any``: just the ``one``.\n\n``one`` is a simple function to check if there is a unique value\nthat evaluates to True in an iterable, and return it. Optionally,\nit receives a callable as the test function.\n\nExamples:\n\n.. code-block:: python\n\n    >>> from one import one\n    >>> one((True, False, False))\n    True\n    >>> one((True, False, True))\n    False\n    >>> one((0, 0, 'a'))\n    'a'\n    >>> one((0, False, None))\n    False\n    >>> one((True, True))\n    False\n    >>> one(('', 1))\n    1\n    >>> one((10, 20, 30, 42), lambda i: i > 40)\n    42\n\nInstall\n--------\n\n::\n\n    pip install one\n\nUsage\n-----\n\n::\n\n    from one import one\n\n\n\nPatterns and use cases\n----------------------\n\n``one`` could replace the following patterns:\n\n.. code-block:: python\n\n\n        true_values = [i for i in iterable if cmp(i)]\n        if len(true_values) == 1:\n            return true_values[0]\n        return False\n\n        # using one\n        return one(iterable, cmp)\n\nAnother pattern, is in a complex condition\n\n.. code-block:: python\n\n\n        if ((a and not b and not c) or\n             (b and not a and not c) or\n              (c and not a and not b)):\n            do_something()\n\n        # using one\n        if one((a, b, c)):\n            do_something()\n\n\nA very frequent case is when you have values that must exclude each others.\n\n\n.. code-block:: python\n\n    class ShopStore(models.Model):\n        address = models.CharField(max_length=200, null=True, blank=True)\n        is_online = models.BooleanField(default=False)\n\n        def clean(self):\n            if not one((self.address, self.is_online)):\n                raise models.ValidationError(u'A shop must be online or physical, but not both')\n\n\nSend me your examples!",
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