Python Lists and Dicts With AI

users = [
    {"name": "Ada", "active": True,  "score": 91},
    {"name": "Bo",  "active": False, "score": 72},
    {"name": "Cy",  "active": True,  "score": 85},
]

# Active users, sorted by score descending
active = sorted(
    (u for u in users if u["active"]),
    key=lambda u: u["score"],
    reverse=True,
)

# Lookup table by name
by_name: dict[str, dict] = {u["name"]: u for u in users}

print(by_name.get("Ada", {}).get("score"))  # 91

# Prompt: "Given list of dicts with 'tag' and 'count', return a dict mapping tag -> total count."
from collections import Counter

def totals(items: list[dict]) -> dict[str, int]:
    c: Counter[str] = Counter()
    for item in items:
        c[item["tag"]] += item["count"]
    return dict(c)