Ошибка с библиотекой web3 и методом getBalance

from web3 import eth
k='0xd4FD252d7D2C9479a8d616F510eAC6243B5DDdf9'
balance = eth.Eth.getBalance(k)

Traceback (most recent call last):
  File "C:/Users/user/Desktop/main.py", line 12, in <module>
    balance = eth.Eth.getBalance(k)
TypeError: getBalance() missing 1 required positional argument: 'account'