How to access any object in simple_salesforce Salesforce class, when the object's name is stored in a string?

Question

I can e.g. do

from simple_salesforce import Salesforce
sf = Salesforce()
sf.Account.describe()

to access the account object. However, I am passed the object as a string like

sf_object = "Account"

How can I now access the object? sf[sf_object], sf(sf_object) and sf.sf_object all don't work. Thanks for your help!