Chapter 4 cannot produce "linkedin_connections.json"

[maggiex]

After successfully geocoding locations of linkedin connections, one cannot save the connections data into json. The reported error after running the cell is the following:

#Save the processed data
CONNECTIONS_DATA = 'linkedin_connections.json'

# Loop over contacts and update the location information to store the
# string address, also adding latitude and longitude information
def serialize_contacts(contacts, output_filename):
    for c in contacts:
        location = c['Location']
        if location != None:
            # Convert the location to a string for serialization
            c.update([('Location', location.address)])
            c.update([('Lat', location.latitude)])
            c.update([('Lon', location.longitude)])
    f = open(output_filename, 'w')
    f.write(json.dumps(contacts, indent=1))
    f.close()
    return
serialize_contacts(contacts, CONNECTIONS_DATA)

---

AttributeError Traceback (most recent call last)
in
16 f.close()
17 return
---> 18 serialize_contacts(contacts, CONNECTIONS_DATA)

in serialize_contacts(contacts, output_filename)
9 if location != None:
10 # Convert the location to a string for serialization
---> 11 c.update([('Location', location.address)])
12 c.update([('Lat', location.latitude)])
13 c.update([('Lon', location.longitude)])

AttributeError: 'str' object has no attribute 'address'