Esempio n. 1
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    def map(self, function, *iterables, **kwargs):
        """Returns an iterator equivalent to map(function, iterables).

        *chunksize* controls the size of the chunks the iterable will
        be broken into before being passed to the function. If None
        the size will be controlled by the Pool.

        """
        self._check_pool_state()

        timeout = kwargs.get('timeout')
        chunksize = kwargs.get('chunksize', 1)

        if chunksize < 1:
            raise ValueError("chunksize must be >= 1")

        futures = [
            self.schedule(process_chunk, args=(function, chunk))
            for chunk in iter_chunks(chunksize, *iterables)
        ]

        map_future = MapFuture(futures)
        if not futures:
            map_future.set_result(MapResults(futures))
            return map_future

        def done_map(_):
            if not map_future.done():
                map_future.set_result(MapResults(futures, timeout=timeout))

        for future in futures:
            future.add_done_callback(done_map)
            setattr(future, 'map_future', map_future)

        return map_future
Esempio n. 2
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    def map(self, function, *iterables, **kwargs):
        """Returns an iterator equivalent to map(function, iterables).

        *chunksize* controls the size of the chunks the iterable will
        be broken into before being passed to the function. If None
        the size will be controlled by the Pool.

        """
        self._check_pool_state()

        timeout = kwargs.get('timeout')
        chunksize = kwargs.get('chunksize', 1)

        if chunksize < 1:
            raise ValueError("chunksize must be >= 1")

        futures = [self.schedule(process_chunk, args=(function, chunk))
                   for chunk in iter_chunks(chunksize, *iterables)]

        map_future = MapFuture(futures)
        if not futures:
            map_future.set_result(MapResults(futures))
            return map_future

        def done_map(_):
            if not map_future.done():
                map_future.set_result(MapResults(futures, timeout=timeout))

        for future in futures:
            future.add_done_callback(done_map)
            setattr(future, 'map_future', map_future)

        return map_future
Esempio n. 3
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    def map(self, function, *iterables, **kwargs):
        """Computes the *function* using arguments from
        each of the iterables. Stops when the shortest iterable is exhausted.

        *timeout* is an integer, if expires the task will be terminated
        and the call to next will raise *TimeoutError*.
        The *timeout* is applied to each chunk of the iterable.

        *chunksize* controls the size of the chunks the iterable will
        be broken into before being passed to the function.

        A *pebble.ProcessFuture* object is returned.

        """
        self._check_pool_state()

        timeout = kwargs.get('timeout')
        chunksize = kwargs.get('chunksize', 1)

        if chunksize < 1:
            raise ValueError("chunksize must be >= 1")

        futures = [
            self.schedule(process_chunk,
                          args=(function, chunk),
                          timeout=timeout)
            for chunk in iter_chunks(chunksize, *iterables)
        ]

        map_future = ProcessMapFuture(futures)
        if not futures:
            map_future.set_result(MapResults(futures))
            return map_future

        def done_map(_):
            if not map_future.done():
                map_future.set_result(MapResults(futures))

        for future in futures:
            future.add_done_callback(done_map)
            setattr(future, 'map_future', map_future)

        return map_future