Walrus Operator in 3.8

[nilamo]

https://medium.com/hultner/try-out-walru...30ce0ce601

Seems pretty cool for buffers.

# instead of...
buffer = create_buffer()
while True:
    chunk = buffer.read()
    if not chunk:
        break
    process(chunk)

# ...you'll be able to do this:
buffer = create_buffer()
while chunk := buffer.read():
    process(chunk)