solc.install 总是卡死，他拉取的网站出问题了
直接把所有的包都下载下来
sudo add-apt-repository ppa:ethereum/ethereum
sudo apt-get update
sudo apt-get install solc
pip install py-solc-x
文档
https://web3py.readthedocs.io/en/stable/web3.contract.html#
用于更改链上状态
tx_hash = my_contract.functions.newRecord(["111","name111","data111"]).transact()
tx_receipt = w3.eth.wait_for_transaction_receipt(tx_hash)
print(tx_receipt)
没有返回值
用于查询，不会修改链上状态，用于查询
result = my_contract.functions.getRecordState("123").call()
print(result)
