The method eth_sendTransaction does not exist/is not available - web3.py

Question

I am trying to send data to the contract, but I am getting the following error: The method eth_sendTransaction does not exist/is not available

This is the code:

from web3 import Web3

web3 = Web3(Web3.HTTPProvider("https://rinkeby.infura.io/v3/9fe6f0a016494dfeb4cecd7d1c98431a"))

from web3.middleware import geth_poa_middleware

web3.middleware_onion.inject(geth_poa_middleware, layer=0)

print(web3.eth.blockNumber)

x = web3.isAddress('0xacb0ceacb13e786644f0ab21aa044032ae925874')
print(x)

abi = '''
   ...
      '''

address = Web3.toChecksumAddress('0xacb0ceacb13e786644f0ab21aa044032ae925874')

lucas = '0x690809206b73994282910F1740a729a89aF4beCa'

myContract = web3.eth.contract(address=address, abi=abi)
key = myContract.functions.storeData([1,4]).transact({'from' : lucas})

print(key)

addedData = myContract.functions.getData(key).call()
print(addedData)

The above code can connect to the network rinkeby normally, but cannot perform the transaction. The storeData method takes an array and returns an uint which is key and is working normally in Remix.

I'm using Metamask.

Answer 1

key = myContract.functions.storeData([1,4]).buildTransaction({'nonce': web3.eth.getTransactionCount(address)})

signed_tx = web3.eth.account.signTransaction(key, private_key='...')

web3.eth.sendRawTransaction(signed_tx.rawTransaction)