code: def get_block_height(self, is_full: bool = False) -> int or dict:
          
          response = self.get_block_count(is_full=True)
          response['result'] -= 1
          if is_full:
              return response
          return response['result']
docs: This interface is used to get the decimal block height in current network.
  
          Return:
              the decimal total height of blocks in current network.