Web3.py
Fleeting- External reference: https://web3py.readthedocs.io/en/stable/web3.eth.account.html
Working with Local Private Keys — Web3.py 5.19.0 documentation
Each account returned by w3.eth.accounts has a hosted private key stored in your node. This allows you to use send_transaction().
— https://web3py.readthedocs.io/en/stable/web3.eth.account.html
It is unnacceptable for a hosted node to offer hosted private keys. It gives other people complete control over your account. “Not your keys, not your Ether” in the wise words of Andreas Antonopoulos
— https://web3py.readthedocs.io/en/stable/web3.eth.account.html