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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(block_id):
 """Return the Processing Block Configuration for the specified ID"""

    identifiers = block_id.split(':')
    scheduling_block_id = identifiers[0]
    scheduling_block_config = get_scheduling_block(scheduling_block_id)
    for processing_block in scheduling_block_config['processing_blocks']:
        if processing_block['id'] == block_id:
            return processing_block
    raise KeyError('Unknown Processing Block id: {} ({})'
                   .format(identifiers[-1], block_id))