code: def _generate_processing_blocks(start_id, min_blocks=0, max_blocks=4):
      
      processing_blocks = []
      num_blocks = random.randint(min_blocks, max_blocks)
      for i in range(start_id, start_id + num_blocks):
          _id = 'sip-pb{:03d}'.format(i)
          block = dict(id=_id, resources_requirement={}, workflow={})
          processing_blocks.append(block)
      return processing_blocks
docs: Generate a number of Processing Blocks