case — Intermediate Playground

# Type patterns with capture
def process(value):
    match value:
        case int(n):
            print(f"Integer: {n}")
        case str(s):
            print(f"String: {s!r}")
        case list() as items:
            print(f"List with {len(items)} items")
        case dict() as d:
            print(f"Dict with keys: {list(d.keys())}")
        case None:
            print("None value")
        case _:
            print(f"Other: {type(value).__name__}")

for v in [42, "hello", [1, 2], {"a": 1}, None, 3.14]:
    process(v)

# Starred patterns
match [1, 2, 3, 4, 5]:
    case [first, *rest]:
        print(f"First: {first}, rest: {rest}")

match [1]:
    case [x, *rest] if not rest:
        print(f"Single element: {x}")