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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_processing_block_ids(self):
 """Get list of processing block ids using the processing block id"""


        # Initialise empty list
        _processing_block_ids = []

        # Pattern used to search processing block ids
        pattern = '*:processing_block:*'
        block_ids = self._db.get_ids(pattern)

        for block_id in block_ids:
            id_split = block_id.split(':')[-1]
            _processing_block_ids.append(id_split)
        return sorted(_processing_block_ids)