Car in Garage Sensor | Python Fiddle

#!/usr/bin/env python
from gpiozero import DistanceSensor
from time import sleep
import urllib
import pickle

# Define what pins to use
echo_pin = 17
trigger_pin = 4

# Define urls for IFTTT
ocuppied_url = "https://maker.ifttt.com/trigger/car_in_garage/with/key/c8Z6PR-5Dful7BaL_C7r5R"
vacant_url = "https://maker.ifttt.com/trigger/car_not_in_garage/with/key/c8Z6PR-5Dful7BaL_C7r5R"

# Load previous results or return None
distance_file = "distance.bin"
try:
    with open(distance_file, 'rb') as file_handle:
    	old_distance = pickle.load(file_handle)
except:
    old_distance = None

# Get sensor data
sensor = DistanceSensor(echo=echo_pin, trigger=trigger_pin)
distance = sensor.distance
print("Distance:")
print(distance)

# Save current results to file
with open(distance_file, 'wb') as file_handle:
	pickle.dump(distance, file_handle)

# Check for the presence of a car

# Ocuppied
if sensor.distance < 1.0: 
    # Only send an alert if the state changes
    if old_distance == None or old_distance == 1.0:
    	webpage = urllib.urlopen(ocuppied_url)
        print("Webpage result:")
        print(webpage.read())
        
# Vacant
else:
    # Only send an alert if the state changes
    if old_distance == None or old_distance < 1.0:
    	webpage = urllib.urlopen(vacant_url)
        print("Webpage result:")
        print(webpage.read())

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