in taskcluster/local_taskgraph/date_tasks.py [0:0]
def index_task_exists(index):
url = f"{CI_INDEX_API}/task/{index}"
request = Request(url, headers={"User-Agent": "crash-ping-ingest/1.0 daily_batches"}, method="HEAD")
try:
return urlopen(request).status == 200
except:
return False