For Python 3.8, the biggest change is the addition of assignment expressions. Specifically, the := operator gives you a new syntax for assigning variables in the middle of expressions. This operator is colloquially known as the walrus operator.

From: https://realpython.com/python-walrus-operator/

Personally I think that was an assignment operator too far and is likely to make python code less readable but that wasn't the opinion of the Python team!