geocode.py

import csv
import time
from pygeocoder import Geocoder
from pygeocoder import GeocoderError

# We can only geocode up to 2500 properties a day (per IP Address)

input_file = open('data.csv', 'r') # Opens the .csv file
output_file = open('data_new.csv', 'w') # Make an empty .csv This is where your geocodes will end up.
data = csv.reader(input_file)
print('begin')


for line in data:
    [Address] = line # Make sure the number of columns matches/aligns with the number of fields listed here.
    if Address == "Address": # This skips the header. Don't geocode the header :D
        Latitude = ["Latitude"]
        Longitude = ["Longitude"] 
        new_line = line + Latitude + Longitude # This adds two new columns to your .csv, Latitude and Longitude.
        csv.writer(output_file).writerow(new_line)
        print new_line # This isn't required. I just like to watch.
    else:
        results = Geocoder.geocode(Address)
        Latitude = [results.coordinates[0]] 
        Longitude = [results.coordinates[1]]
        new_line = line + Latitude + Longitude
        csv.writer(output_file).writerow(new_line)
        time.sleep(.21) #This throttles your requests. The GoogleAPI doesn't like too many requests per second.
        print new_line 

print ('Listo!')

input_file.close()
output_file.close()