How do I look up a Seedance video's real cost by task_id?

curl --compressed -s "https://api.apiyi.com/api/task/self?p=1&page_size=1&task_id=<your task_id>" \
  -H "Authorization: $APIYI_SYS_TOKEN" | jq '.data.items[0] | {task_id, status, quota, submit_time, finish_time}'

import os, time, requests

BASE = "https://api.apiyi.com"
HEADERS = {"Authorization": os.environ["APIYI_SYS_TOKEN"], "Accept": "application/json"}

def video_cost(task_id: str):
    """Return (status, cost in USD). Failed tasks cost 0; in-progress tasks return None."""
    r = requests.get(f"{BASE}/api/task/self", headers=HEADERS, timeout=60,
                     params={"p": 1, "page_size": 1, "task_id": task_id})
    r.raise_for_status()
    items = r.json()["data"]["items"]
    if not items:
        return None, None
    task = items[0]
    status = task["status"]
    if status == "completed":
        return status, task["quota"] / 500_000
    if status == "failed":
        return status, 0.0
    return status, None          # submitted / in_progress: quota is only the pre-charge, do not book it yet

def list_tasks(start: int, end: int, page_size: int = 100):
    """Page through a submission-time window; p starts at 1, stop on an empty page."""
    p = 1
    while True:
        r = requests.get(f"{BASE}/api/task/self", headers=HEADERS, timeout=60,
                         params={"p": p, "page_size": page_size,
                                 "start_timestamp": start, "end_timestamp": end})
        r.raise_for_status()
        items = r.json()["data"]["items"]
        if not items:
            return
        yield from items
        p += 1
        time.sleep(1)