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    "info": {
        "author": "Dmitry Vakhrushev",
        "author_email": "self@kr41.net",
        "bugtrack_url": null,
        "classifiers": [
            "Intended Audience :: Developers",
            "License :: OSI Approved :: BSD License",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3.3",
            "Programming Language :: Python :: 3.4",
            "Programming Language :: Python :: 3.5",
            "Programming Language :: Python :: Implementation :: CPython",
            "Programming Language :: Python :: Implementation :: PyPy",
            "Topic :: Software Development :: Libraries :: Python Modules"
        ],
        "description": "Green Rocket\n============\n\nGreen Rocket is a simple and compact implementation of Observer\n(or Publish/Subscribe) design pattern via signals.\n\nCreate specific signal using base one:\n\n..  code-block:: pycon\n\n    >>> from greenrocket import Signal\n    >>> class MySignal(Signal):\n    ...     pass\n    ...\n\nSubscribe handler:\n\n..  code-block:: pycon\n\n    >>> @MySignal.subscribe\n    ... def handler(signal):\n    ...     print('handler: ' + repr(signal))\n    ...\n\nFire signal:\n\n..  code-block:: pycon\n\n    >>> MySignal().fire()\n    handler: MySignal()\n\nIf you are using ``asyncio``, you can also use coroutines as handlers\nand fire signal asynchronously using ``await Signal.afire()`` or\n``yield from Signal().afire()``.  Method ``afire()`` works well with\nsynchronous handlers too.\n\nNote, that signal propagates over inheritance, i.e. all subscribers of base\nsignal will be called when child one is fired:\n\n..  code-block:: pycon\n\n    >>> @Signal.subscribe\n    ... def base_handler(signal):\n    ...     print('base_handler: ' + repr(signal))\n    ...\n    >>> MySignal().fire()\n    handler: MySignal()\n    base_handler: MySignal()\n\nUnsubscribe handler:\n\n..  code-block:: pycon\n\n    >>> MySignal.unsubscribe(handler)\n    >>> MySignal().fire()\n    base_handler: MySignal()\n\nThe handler is subscribed using weak reference.  So if you create and subscribe\na handler in local scope (for example inside a generator), it will be\nunsubscribed automatically.\n\n..  code-block:: pycon\n\n    >>> def gen():\n    ...     @MySignal.subscribe\n    ...     def local_handler(signal):\n    ...         print('local_handler: ' + repr(signal))\n    ...     yield 1\n    ...\n    >>> for value in gen():\n    ...     MySignal(value=value).fire()\n    ...\n    local_handler: MySignal(value=1)\n    base_handler: MySignal(value=1)\n    >>> import gc                    # PyPy fails the following test without\n    >>> _ = gc.collect()             # explicit call of garbage collector.\n    >>> MySignal(value=2).fire()\n    base_handler: MySignal(value=2)\n    >>> Signal.unsubscribe(base_handler)\n\nAs you can see above, signal constructor accepts keyword arguments.  These\narguments are available as signal's attributes:\n\n..  code-block:: pycon\n\n    >>> s = MySignal(a=1, b=2)\n    >>> s.a\n    1\n    >>> s.b\n    2\n\nSignal suppresses any exception which is raised on handler call.  It uses\nlogger named ``greenrocket`` from standard ``logging`` module to log errors and\ndebug information.\n\nThe library also provides ``Watchman`` class as a convenient way for testing\nsignals.\n\nCreate watchman for specific signal:\n\n..  code-block:: pycon\n\n    >>> from greenrocket import Watchman\n    >>> watchman = Watchman(MySignal)\n\nFire signal:\n\n..  code-block:: pycon\n\n    >>> MySignal(x=1).fire()\n\nTest signal:\n\n..  code-block:: pycon\n\n    >>> watchman.assert_fired_with(x=1)\n    >>> watchman.assert_fired_with(x=2)          # DOCTEST: +ellipsis\n    Traceback (most recent call last):\n      ...\n    AssertionError: Failed assertion on MySignal.x: 1 != 2\n    >>> watchman.assert_fired_with(x=1, y=2)     # DOCTEST: +ellipsis\n    Traceback (most recent call last):\n      ...\n    AssertionError: MySignal has no attribute y\n\nWatchman object saves each fired signal to its log:\n\n..  code-block:: pycon\n\n    >>> watchman.log\n    [MySignal(x=1)]\n    >>> MySignal(x=2).fire()\n    >>> watchman.log\n    [MySignal(x=1), MySignal(x=2)]\n\nThe method ``assert_fired_with`` tests the last signal from\nthe log by default:\n\n..  code-block:: pycon\n\n    >>> watchman.assert_fired_with(x=2)\n\nBut you can specify which one to test:\n\n..  code-block:: pycon\n\n    >>> watchman.assert_fired_with(-2, x=1)\n\n\n\nCHANGES\n=======\n\n0.30\n----\n\n*   Added ``Signal.afire()`` method that returns awaitable to support\n    coroutine-based signal handlers\n*   Dropped Python 2.6 and 3.2 support\n\n0.22\n----\n\n*   Added `Watchman` class as a testing helper\n\n0.21\n----\n\n*   Removed distribute dependency\n*   Improved tests\n\n0.20\n----\n\n*   Changed handler subscription mechanism from subscription by reference to\n    subscription by weak reference\n\n0.11\n----\n\n*   Fixed logger loose on program termination\n\n0.1\n---\n\n*   Initial release",
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        "keywords": "signal observer publisher subscriber asyncio",
        "license": "BSD",
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        "name": "GreenRocket",
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