How to run python script in cron?

Question

Python

Hello everyone, help me run the script in cron, the scheduler itself works, but the script itself does not work, although when launched on a LAN, everything works with a bang!
here is part of the code

# -*- coding: utf-8 -*-

import time
import eventlet
import requests
import logging
import telebot
from time import sleep

URL_VK = 'https://api.vk.com/method/wall.get?domain=bootstraphtml5&count=10&filter=owner'
FILENAME_VK = 'last_known_id.txt'
BASE_POST_URL = 'https://vk.com/wall-74027819_'
BOT_TOKEN = 'тут токен бота'
CHANNEL_NAME = '@bootstraphtml5'
SINGLE_RUN = True
bot = telebot.TeleBot(BOT_TOKEN)
def get_data():
    timeout = eventlet.Timeout(10)
    try:
        feed = requests.get(URL_VK)
        return feed.json()
    except eventlet.timeout.Timeout:
        logging.warning('Got Timeout while retrieving VK JSON data. Cancelling...')
        return None
    finally:
        timeout.cancel() 
def send_new_posts(items, last_id):
    for item in items:
        if item['id'] <= last_id:

Answer 1

There may be several reasons, import error, no interpreter specified, sometimes it's worth doing cd scriptdir first. Give an example of a line in the crontab and what error you get, so as not to guess.

Answer 2

Use absolute paths and you will be happy.
How can the system understand where the file is located ???
At least like this:
Or like this:

PREFIX = "/var/tmp/"
FILENAME_VK = '%s/last_known_id.txt' % PREFIX