A Pythonista script that logs you into Foursquare. See http://craigeley.com/08-18-2014/foursquare-pythonista/ for more information.

foursquare_checkin.py

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

# To call script, use the follwing URL Action:
# - <pythonista://foursquare_checkin.py?action=run>

# Replace the information in lines 21-23 with your actual client and authorization codes.
 
import location
import re
import sys
import urllib
import console
import webbrowser
import json
import requests

location.start_updates()
 
name = console.input_alert("Location", "Where are you?")

client_id = "CLIENT_ID"
client_secret = "CLIENT_SECRET"
access_token = "OAUTH_TOKEN"

b = location.get_location()
location.stop_updates()

ll = str(b["latitude"]) + "," + str(b["longitude"])

full_url = "https://api.foursquare.com/v2/venues/search?ll="+ll+"&query="+name+"&limit=1&client_id="+client_id+"&client_secret="+client_secret+"&v=20140816"

req = urllib.urlopen(full_url)
fsdata=json.load(req)
for item in fsdata['response']['venues']:
	id = (item['id'])
	venue = (item['name'])

checkin = "https://api.foursquare.com/v2/checkins/add?venueId="+id+"&ll="+ll+"&oauth_token="+access_token+"&v=20140816&m=swarm"

requests.post(checkin)

console.hud_alert("Checked in at "+venue)

webbrowser.open("launch://")