Script to monitor files left in FTP queue

FTP Monitor.py

import os
import requests
import json
from itertools import islice
from pathlib import Path
import time
import prefect
from prefect import task, Flow
from prefect.schedules import Schedule
from prefect.schedules.clocks import CronClock
from prefect.storage import Local
import pendulum


PY_SCRIPT = 'F:/Analytics/Workflows_prefect/IT/FTP Monitor.py'
FLOW_NAME = 'FTP Monitor'
PROJECT = 'IT'

prime_cargo_dir: str = 'D:\\PrimeCargo\\Live\\Ud\\'
now: float = time.time()
age: int = 0
msg: str = ''

def post_teams(msg: str):
    base_url = 'INBOUND_WEBHOOK'
    payload = {
    "@type": "MessageCard",
    "@context": "https://schema.org/extensions",
    "summary": "FTP Notification",
    "themeColor": "001A4D",
    "title": "⚠ FTP Server Notification",
    "sections": [
        {
        "text": msg
        }
    ]
    }
    headers = {
          "Content-Type": "application/json",
           "Accept": "application/json"
          }
    res = requests.request('POST', base_url, headers=headers, data=json.dumps(payload))
    return res.text.encode('UTF-8')

@task(max_retries=3, retry_delay=pendulum.duration(seconds=30))
def check_files(folder: str):
    paths = [f.path for f in islice(os.scandir(prime_cargo_dir),2000)]
    for f in paths:
        age = int((now - os.stat(f).st_ctime) / 60)
        if age > 30:
            post_teams(f"FTP Server has stopped, file {f} is {age} minutes old")
            break
        else:
            pass

schedule = Schedule(clocks=[CronClock("0 */1 * * *",start_date=pendulum.now())])

with Flow(FLOW_NAME,schedule, storage=Local(path=PY_SCRIPT, stored_as_script=True)) as flow:
    check_files(prime_cargo_dir)

flow.register(project_name=PROJECT)