Closing line value calculator against Pinnacle's close

import os
import time
from datetime import datetime, timezone
import requests

BASE = os.environ["ODDS_BASE_URL"]
KEY = os.environ["ODDS_API_KEY"]
URL = BASE + "/kit/v1/markets"
HDR = {"x-portal-apikey": KEY}
seen = {}  # event_id: (starts, prices)


def utc(stamp):
    return datetime.fromisoformat(
        stamp.replace("Z", "+00:00"))


def tick(sport_id):
    q = {"sport_id": sport_id,
         "event_type": "prematch"}
    r = requests.get(URL, params=q,
                     headers=HDR,
                     timeout=10)
    r.raise_for_status()
    for ev in r.json()["events"]:
        per = ev["periods"]
        ml = per.get("num_0", {}).get(
            "money_line")
        if ml:
            seen[ev["event_id"]] = (
                ev["starts"], ml)


def settle():
    now = datetime.now(timezone.utc)
    for eid, (starts, ml) in list(
            seen.items()):
        if utc(starts) <= now:
            print(eid, "closed at", ml)
            del seen[eid]


while True:
    tick(sport_id=1)  # soccer
    settle()
    time.sleep(60)

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