Assignment Expressions in Python 3.8

import re

# Python 3.7 #########################

cmd = input("Enter a command, or just press enter to quit: \n> ")
while cmd:

    match = re.match(r"Alexa, play ((\w+\s)*\w+)\.", cmd)
    if match:
        song_name = match.group(1)
        print(f"Playing {song_name}...")

    else:
        match = re.match(r"Alexa, dim the lights in ((\w+\s)*\w+)\.", cmd)
        if match:
            room_name = match.group(1)
            print(f"Dimming the lights in {room_name}...")

        else:
            match = re.match(r"Alexa, call ((\w+\s)*\w+)\.", cmd)
            if match:
                name = match.group(1)
                print(f"Calling {name}...")

            else:
                print(f"I don't understand.")

    cmd = input("Enter a command, or just press enter to quit: \n> ")



# Python 3.8 #########################

while cmd := input("Enter a command, or just press enter to quit: \n> "):

    if match := re.match(r"Alexa, play ((\w+\s)*\w+)\.", cmd):
        song_name = match.group(1)
        print(f"Playing {song_name}...")

    elif match := re.match(r"Alexa, dim the lights in ((\w+\s)*\w+)\.", cmd):
        room_name = match.group(1)
        print(f"Dimming the lights in {room_name}...")

    elif match := re.match(r"Alexa, call ((\w+\s)*\w+)\.", cmd):
        name = match.group(1)
        print(f"Calling {name}...")

    else:
        print(f"I don't understand.")