Get alerted, via Slack, to items of interest on free craigslist

craigslist-alerter.py

import os
import json

import requests
from bs4 import BeautifulSoup

target_keywords = ['bookshelf', 'book shelf', 'desk']

url = 'https://cosprings.craigslist.org/search/zip'
r = requests.get(url)

hit = any([x in r.text.lower() for x in keywords])

if hit:
    soup = BeautifulSoup(r.text, 'html.parser')
    links = soup.find_all('a', {'class': 'result-title'})

    targets = []

    for kw in target_keywords:
        for l in links:
            if kw in l.text.lower():
                targets.append(l)

    slack_hook = os.environ.get('MY_COOL_SLACK_HOOK')

    if slack_hook:
        fmt = '  👉  <{}|{}>'
        msg = '\n'.join([fmt.format(x['href'], x.text.strip())
                         for x in targets])

        payload = {
            'channel': '@cjwinchester',
            'username': 'Craigslist bot',
            'icon_emoji': ':roast-beef:',
            'text': '*New on Craigslist*\n' + msg
        }

        payload_as_json = json.dumps(payload)

        requests.post(slack_hook, data=payload_as_json)
    else:
        print('You need the "MY_COOL_SLACK_HOOK" variable.')