code: def pixy_init(self, max_blocks=5, cb=None, cb_type=None):
          
          task = asyncio.ensure_future(self.core.pixy_init(max_blocks, cb, cb_type))
          self.loop.run_until_complete(task)
docs: Initialize Pixy and will enable Pixy block reporting.
          This is a FirmataPlusRB feature.
  
          :param cb: callback function to report Pixy blocks
  
          :param cb_type: Constants.CB_TYPE_DIRECT = direct call or
                          Constants.CB_TYPE_ASYNCIO = asyncio coroutine
  
          :param max_blocks: Maximum number of Pixy blocks to report when many
                             signatures are found.
  
          :returns: No return value.