Get alerted when a page loses clicks

from datetime import date, timedelta
from urllib.parse import quote
from clickruntime import on_trigger, credentials, http, notify

SITE = "sc-domain:example.com"

def clicks_by_page(headers, start, end):
    resp = http.post(f"https://www.googleapis.com/webmasters/v3/sites/{quote(SITE, safe='')}/searchAnalytics/query",
                     headers=headers, json={"startDate": str(start), "endDate": str(end),
                                            "dimensions": ["page"], "rowLimit": 5000})
    resp.raise_for_status()
    return {r["keys"][0]: r["clicks"] for r in resp.json().get("rows", [])}

@on_trigger
def run(event):
    headers = {"Authorization": f"Bearer {credentials.connection('google', 'work')}"}
    end = date.today() - timedelta(days=3)  # Search Console data lags a couple of days
    now = clicks_by_page(headers, end - timedelta(days=6), end)
    before = clicks_by_page(headers, end - timedelta(days=13), end - timedelta(days=7))
    drops = [(p, c, now.get(p, 0)) for p, c in before.items() if c >= 50 and now.get(p, 0) < c * 0.6]
    if drops:
        lines = [f"{p}: {c:.0f} → {n:.0f} clicks ({(n - c) / c:.0%})" for p, c, n in sorted(drops, key=lambda d: d[2] / d[1])]
        notify.email_me(f"{len(drops)} pages lost over 40% of clicks", "\n".join(lines))
    return {"dropped": len(drops)}