Sådan trækker jeg links til gratis Zetland-artikler ud fra Zetlands Twitter-konto til wallnot.dk

# -*- coding: utf-8 -*-
# Author: Morten Helmstedt. E-mail: helmstedt@gmail.com
""" This program uses the Twitter API to get a list of free articles from Zetland """

import requests
from bs4 import BeautifulSoup
from datetime import datetime
from datetime import date
import json
from nested_lookup import nested_lookup
import base64


# GETS TWITTER DATA #

# Key and secret from Twitter developer account: https://developer.twitter.com/en/apply/user
client_key = ''
client_secret = ''

# Key and secret encoding, preparing for Twitter request
key_secret = '{}:{}'.format(client_key, client_secret).encode('ascii')
b64_encoded_key = base64.b64encode(key_secret)
b64_encoded_key = b64_encoded_key.decode('ascii')

base_url = 'https://api.twitter.com/'
auth_url = '{}oauth2/token'.format(base_url)

auth_headers = {
	'Authorization': 'Basic {}'.format(b64_encoded_key),
	'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8'
}

auth_data = {
	'grant_type': 'client_credentials'
}

auth_resp = requests.post(auth_url, headers=auth_headers, data=auth_data)
auth_resp.json().keys()
access_token = auth_resp.json()['access_token']

search_headers = {
	'Authorization': 'Bearer {}'.format(access_token)
}

# Search parameters for Zetland tweets
search_params = {
	'user_id': 452898921,
	'count': 35,
	'tweet_mode': 'extended',
	'exclude_replies': 'true',
	'trim_user': 'true'
}

# Request url for searching user timelines
search_url = '{}1.1/statuses/user_timeline.json'.format(base_url)

# Request to Twitter
search_resp = requests.get(search_url, headers=search_headers, params=search_params)

# Response from Twitter in json format
tweet_data = search_resp.json()
#prettyjson = json.dumps(tweet_data, ensure_ascii=False, indent=4) # Only needed for debugging to pretify json

# Looks for all instances of expanded_url (that is, links) in json	
linklist = list(set(nested_lookup('expanded_url', tweet_data)))

# Populates a list of links to Zetland articles
urllist = []
for link in linklist:
	if "zetland.dk/historie" in link:
		urllist.append(link)

		
# GETS ARTICLE DATA FROM ZETLAND #
		
# Requests articles and get titles and dates and sort by dates directly from Zetland site
articlelist = []
titlecheck = []

for url in urllist:
	try:
		data = requests.get(url)
		result = data.text

		# Soup site and create a dictionary of links and their titles and dates
		articledict = {}
		soup = BeautifulSoup(result, "lxml")

		title = soup.find('meta', attrs={'property':'og:title'})
		title = title['content']
		
		timestamp = soup.find('meta', attrs={'property':'article:published_time'})
		timestamp = timestamp['content']
		timestamp = timestamp[:timestamp.find("+")]
		dateofarticle = datetime.strptime(timestamp, '%Y-%m-%dT%H:%M:%S.%f')
		
		if title not in titlecheck:
			articlelist.append({"title": title, "url": url, "date": dateofarticle})
			titlecheck.append(title)
	except:
		print(url)


# PREPARES LIST OF ARTICLES FOR WALLNOT.DK #

# Sort articles by date (newest first)		
articlelist_sorted = sorted(articlelist, key=lambda k: k['date'], reverse=True) 

# Removes articles older than approximately three months
articlelist_recent = []
now = datetime.now()
for article in articlelist_sorted:
	timesincelast = now - article["date"]
	if timesincelast.days < 92:
		articlelist_recent.append(article)

# Converts dates to friendly format for display and outputs articles as html paragraphs
zet_linkstr = ""
for article in articlelist_recent:
	friendlydate = article["date"].strftime("%d/%m")
	zet_linkstr += '<p>' + friendlydate + ': ' + '<a href="' + article["url"] + '">' + article["title"] + '</a></p>\n' 

# Prints list of articles	
print(zet_linkstr)