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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def batch_watch(parameterized, run=True):
 """ Context manager to batch watcher events on a parameterized object. The context manager will queue any events triggered by setting a parameter on the supplied parameterized object and dispatch them all at once when the context manager exits. If run=False the queued events are not dispatched and should be processed manually. """

    BATCH_WATCH = parameterized.param._BATCH_WATCH
    parameterized.param._BATCH_WATCH = True
    try:
        yield
    finally:
        parameterized.param._BATCH_WATCH = BATCH_WATCH
        if run and not BATCH_WATCH:
            parameterized.param._batch_call_watchers()