Pending futures are done executing and the resources associated with theĮxecutor have been freed. If wait is True then this method will not return until all the Calls toĮxecutor.submit() and Executor.map() made after shutdown will When the currently pending futures are done executing. Signal the executor that it should free any resources that it is using shutdown ( wait = True, *, cancel_futures = False ) ¶ ThreadPoolExecutor, chunksize has no effect.Ĭhanged in version 3.5: Added the chunksize argument. Performance compared to the default size of 1. Using a large value for chunksize can significantly improve The (approximate) size of these chunks can be specified by Into a number of chunks which it submits to the pool as separate When using ProcessPoolExecutor, this method chops iterables Raised when its value is retrieved from the iterator. If a func call raises an exception, then that exception will be None, there is no limit to the wait time. If _next_() is called and the result isn’t availableĪfter timeout seconds from the original call to Executor.map().
The returned iterator raises a TimeoutError The iterables are collected immediately rather than lazily įunc is executed asynchronously and several calls to result ()) map ( func, * iterables, timeout = None, chunksize = 1 ) ¶
submit ( pow, 323, 1235 ) print ( future. With ThreadPoolExecutor ( max_workers = 1 ) as executor : future = executor.
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