Get emailed when a web page changes, with snapshots in Drive

from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
import difflib, hashlib, io, re
from datetime import datetime, timezone
from googleapiclient.http import MediaIoBaseUpload
from clickruntime import on_trigger, credentials, http, state, notify

URL = "https://example.com/pricing"
FOLDER_ID = "your-snapshots-folder-id"

@on_trigger
def run(event):
    text = re.sub(r"<[^>]+>", " ", http.get(URL).text)
    lines = [l.strip() for l in text.splitlines() if l.strip()]
    digest = hashlib.sha256("\n".join(lines).encode()).hexdigest()
    if digest == state.get("hash"):
        return {"changed": False}
    old = state.get("lines") or []
    drive = build("drive", "v3", credentials=Credentials(credentials.connection("google", "work")), cache_discovery=False)
    name = f"snapshot {datetime.now(timezone.utc):%Y-%m-%d %H%M}.txt"
    drive.files().create(body={"name": name, "parents": [FOLDER_ID]},
                         media_body=MediaIoBaseUpload(io.BytesIO("\n".join(lines).encode()), "text/plain")).execute()
    if old:
        diff = [l for l in difflib.unified_diff(old, lines, lineterm="", n=0) if l[:1] in "+-" and l[:3] not in ("+++", "---")]
        notify.email_me(f"Page changed: {URL}", "\n".join(diff[:200]))
    state.set("hash", digest)
    state.set("lines", lines[:2000])
    return {"changed": True, "snapshot": name}