{}
users = [
{"name": "Alice", "age": 30, "active": True},
{"name": "Bob", "age": 25, "active": False},
{"name": "Charlie", "age": 35, "active": True},
{"name": "Diana", "age": 28, "active": True},
{"name": "Eve", "age": 22, "active": False},
]
active = sorted(
filter(lambda u: u["active"], users),
key=lambda u: u["name"]
)
print(", ".join(u["name"] for u in active))
avg = sum(u["age"] for u in active) / len(active)
print(f"Průměrný věk: {avg}")