263     def map(self, func, iterable, chunksize=None):  argument
268         return self._map_async(func, iterable, mapstar, chunksize).get()
270     def starmap(self, func, iterable, chunksize=None):  argument
276         return self._map_async(func, iterable, starmapstar, chunksize).get()
278     def starmap_async(self, func, iterable, chunksize=None, callback=None,  argument
283         return self._map_async(func, iterable, starmapstar, chunksize,
286     def _guarded_task_generation(self, result_job, func, iterable):  argument
292             for i, x in enumerate(iterable):
297     def imap(self, func, iterable, chunksize=1):  argument
307                     self._guarded_task_generation(result._job, func, iterable),
316             task_batches = Pool._get_tasks(func, iterable, chunksize)
327     def imap_unordered(self, func, iterable, chunksize=1):  argument
337                     self._guarded_task_generation(result._job, func, iterable),
345             task_batches = Pool._get_tasks(func, iterable, chunksize)
367     def map_async(self, func, iterable, chunksize=None, callback=None,  argument
372         return self._map_async(func, iterable, mapstar, chunksize, callback,
375     def _map_async(self, func, iterable, mapper, chunksize=None, callback=None,  argument
382         if not hasattr(iterable, '__len__'):
383             iterable = list(iterable)
386             chunksize, extra = divmod(len(iterable), len(self._pool) * 4)
389         if len(iterable) == 0:
392         task_batches = Pool._get_tasks(func, iterable, chunksize)
393         result = MapResult(self._cache, chunksize, len(iterable), callback,