code: def MempoolCheck(self):
          
          txs = []
          values = self.MemPool.values()
          for tx in values:
              txs.append(tx)
  
          for tx in txs:
              res = self.RemoveTransaction(tx)
              if res:
                  logger.debug("found tx 0x%s on the blockchain ...removed from mempool" % tx.Hash)
docs: Checks the Mempool and removes any tx found on the Blockchain
          Implemented to resolve https://github.com/CityOfZion/neo-python/issues/703