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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 get_events_for_block_ids(self, block_ids, subscriptions):
 """Get a list of events associated with all the block ids. Args: block_ids (list of str):
 The block ids to search for events that match each subscription. subscriptions (list of EventSubscriptions):
 EventFilter and event type to filter events. Returns (list of Events):
 The Events associated which each block id. Raises: KeyError A block id isn't found within the block store or a transaction is missing from the receipt store. """


        blocks = [self._block_store[block_id] for block_id in block_ids]
        return self.get_events_for_blocks(blocks, subscriptions)