as — Intermediate Playground

# as in match/case captures the matched value
def process(command):
    match command:
        case {"action": "move", "direction": str() as d}:
            return f"Moving {d}"
        case {"action": "attack", "target": str() as t}:
            return f"Attacking {t}"
        case {"action": str() as a}:
            return f"Unknown action: {a}"
        case _:
            return "Invalid command"

print(process({"action": "move", "direction": "north"}))
print(process({"action": "attack", "target": "dragon"}))
print(process({"action": "dance"}))

# as with grouping in except
try:
    raise ValueError("test")
except (ValueError, TypeError) as e:
    print(f"Caught {type(e).__name__}: {e}")