old_contents: import requests
  from redis import Redis
  from rq_scheduler import Scheduler
  
  from twilio.rest import TwilioRestClient
  from datetime import datetime
  
  # Open a connection to your Redis server.
  redis_server = Redis()
  
  # Create a scheduler object with your Redis server.
  scheduler = Scheduler(connection=redis_server)
  
  client = TwilioRestClient()
  
  
  def get_next_pass(lat, lon):
      iss_url = 'http://api.open-notify.org/iss-pass.json'
      location = {'lat': lat, 'lon': lon}
      response = requests.get(iss_url, params=location).json()
  
      next_pass = response['response'][0]['risetime']
  
      print 'Next pass is: ' + str(datetime.fromtimestamp(next_pass))
      return datetime.fromtimestamp(next_pass)
  
  
  def add_to_queue(number, lat, lon):
      # Add this phone number to Redis associated with "lat,lon"
      redis_server.set(number, str(lat) + ',' + str(lon))
  
      # Get the timestamp of the next ISS flyby for this number.
      next_pass_timestamp = get_next_pass(lat, lon)
  
      # Schedule a text to be sent at the time of the next flyby.
      scheduler.enqueue_at(next_pass_timestamp, notify_subscriber, number)
  
      print str(number) + ' has been added to the queue at ' \
          + str(lat) + ', ' + str(lon)
  
  
  def notify_subscriber(number):
      msg_body = "Look up! You may not be able to see it, but the International" \
                 " Space Station is passing above you right now!"
  
      # Retrieve the latitude and longitude associated with this number.
      lat, lon = redis_server.get(number).split(',')
  
      # Send a message to the number alerting them of an ISS flyby.
      client.messages.create(to=number, from_='', body=msg_body)
  
      # Add the subscriber back to the queue to receive their next flyby message.
      add_to_queue(number, lat, lon)
  
      print 'Message has been sent to ' + number
  
new_contents: import requests
  from redis import Redis
  from rq_scheduler import Scheduler
  
  from twilio.rest import TwilioRestClient
  from datetime import datetime
  
  # Open a connection to your Redis server.
  redis_server = Redis()
  
  # Create a scheduler object with your Redis server.
  scheduler = Scheduler(connection=redis_server)
  
  client = TwilioRestClient()
  
  
  def get_next_pass(lat, lon):
      iss_url = 'http://api.open-notify.org/iss-pass.json'
      location = {'lat': lat, 'lon': lon}
      response = requests.get(iss_url, params=location).json()
  
      next_pass = response['response'][0]['risetime']
  
      print 'Next pass is: ' + str(datetime.fromtimestamp(next_pass))
      return datetime.fromtimestamp(next_pass)
  
  
  def add_to_queue(number, lat, lon):
      # Add this phone number to Redis associated with "lat,lon"
      redis_server.set(number, str(lat) + ',' + str(lon))
  
      # Get the timestamp of the next ISS flyby for this number.
      next_pass_timestamp = get_next_pass(lat, lon)
  
      # Schedule a text to be sent at the time of the next flyby.
      scheduler.enqueue_at(next_pass_timestamp, notify_subscriber, number)
  
      print str(number) + ' has been added to the queue at ' \
          + str(lat) + ', ' + str(lon)
  
  
  def notify_subscriber(number):
      msg_body = 'Look up! You may not be able to see it, but the International' \
                 ' Space Station is passing above you right now!'
  
      # Retrieve the latitude and longitude associated with this number.
      lat, lon = redis_server.get(number).split(',')
  
      # Send a message to the number alerting them of an ISS flyby.
      client.messages.create(to=number, from_='', body=msg_body)
  
      # Add the subscriber back to the queue to receive their next flyby message.
      add_to_queue(number, lat, lon)
  
      print 'Message has been sent to ' + number
  
subject: Fix inconsistent quotes in iss.py