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        "author": "Erik van Zijst",
        "author_email": "erik.van.zijst@gmail.com",
        "bugtrack_url": null,
        "classifiers": [
            "Development Status :: 5 - Production/Stable",
            "Intended Audience :: Developers",
            "Intended Audience :: System Administrators",
            "License :: OSI Approved :: MIT License",
            "Natural Language :: English",
            "Operating System :: OS Independent",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3.5",
            "Topic :: Software Development :: Debuggers",
            "Topic :: System :: Benchmark",
            "Topic :: System :: Monitoring",
            "Topic :: Utilities"
        ],
        "description": "Interrupting Cow\n================\n\nInterruptingcow is a generic utility that can relatively gracefully interrupt\nyour Python code when it doesn't execute within a specific number of seconds::\n\n    from interruptingcow import timeout\n\n    try:\n        with timeout(5, exception=RuntimeError):\n            # perform a potentially very slow operation\n            pass\n    except RuntimeError:\n        print \"didn't finish within 5 seconds\"\n\nTimeouts are specified in seconds (as floats with theoretical microsecond\nprecision).\n\n\nInstallation\n------------\n::\n\n    $ pip install interruptingcow\n\n\nReentrant\n---------\n\nInterruptingcow is fully reentrant, which means that you can have nested\ntimeouts::\n\n    from interruptingcow import timeout\n\n    class Outer(RuntimeError): pass\n\n    class Inner(RuntimeError): pass\n\n    try:\n        with timeout(20.0, Outer):\n            try:\n                with timeout(1.0, Inner):\n                    # some expensive operation\n                    try_the_expensive_thing()\n            except Inner:\n                do_the_cheap_thing_instead()\n\n    except Outer:\n        print 'Program as a whole failed to return in 20 secs'\n\nNested timeouts allow a large outer timeout to contain smaller timeouts. If the\ninner timeout is larger than the outer timeout, it is treated as a no-op.\n\n\nFunction Decorators\n-------------------\n\nInterruptingcow can be used both as inline with-statements, as shown in the\nabove examples, as well as function decorator::\n\n    from interruptingcow import timeout\n\n    @timeout(.5)\n    def foo():\n        with timeout(.3):\n            # some expensive operation\n            pass\n\n\nQuotas\n------\n\nYou can allocate a quota of time and then share it across multiple invocations\nto ``timeout()``. This is especially useful if you need to use timeouts inside\na loop::\n\n    from interruptingcow import timeout, Quota\n\n    quota = Quota(1.0)\n    for i in something:\n        try:\n            with timeout(quota, RuntimeError):\n                # perform a slow operation\n                pass\n        except RuntimeError:\n            # do a cheaper thing instead\n\nHere the first iterations of the loop will be able to perform the expensive\noperation, until the shared quota of 1 second runs out and then the remaining\niterations will perform the cheaper alternative.\n\nA single quota instance can also be shared across all calls to ``timeout()``\nyour application makes (including nested calls), to give place an upper bound\non the total runtime, regardless of how many calls to ``timeout()`` you have.\n\nCaveats\n-------\n\nInterruptingcow uses ``signal(SIGALRM)`` to let the operating system interrupt\nprogram execution. This has the following limitations:\n\n1. Python signal handlers only apply to the main thread, so you cannot use this\n   from other threads\n2. You must not use this in a program that uses ``SIGALRM`` itself (this\n   includes certain profilers)",
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        "keywords": "debug watchdog timer interrupt",
        "license": "MIT",
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