GoDaddy DNS Host subdomain updater

#!/usr/bin/env python
# install these python modules (pip install pif godaddypy)
import logging
import pif
from godaddypy import Client, Account
import socket

# Original Source:
# https://saschpe.wordpress.com/2013/11/12/godaddy-dyndns-for-the-poor/
# http://blogs.umb.edu/michaelbazzinott001/2014/09/14/ddns-with-godaddy/
# https://github.com/eXamadeus/godaddypy
#
# Modified by Jeremy Sears (https://stackoverflow.com/users/1240482/jsears)
# Modified by Eric Gandt to support multiple names per domain and multiple domains plus short circuit when records match
# Modified by Jason Frazier to use newest godaddypi and API key authentication instead of non-working pygodaddy U/P logins
#
# ensure you have already created yoursubdomainprefix.yourdomain.example as a new 'A' record in your GoDaddy DNS Management portal
# ensure the time-to-live is reasonably short for DDNS-like operation, 600 seconds is enough without causing issues with GoDaddy
# save this script in a location on your host, mark as executable and use crontab to execute every five minutes
# */5 * * * * /PATH/TO/godaddy.py
#
# You must obtain a Production (not Test) GoDaddy API Key and secret for your account
# https://developer.godaddy.com/keys
#
# you must define these one-letter-named variables and remove the @ signs
K="@YOUR-GODADDY-API-KEY@"
S="@YOUR-GODADDY-API-SECRET@"
H="@yoursubdomainprefix@"
D="@yourdomain.example@"
L="@/PATH/TO/godaddy.log@"

# nothing below here should need modification
logging.basicConfig(filename=L, format='%(asctime)s %(message)s', level=logging.INFO)
# the "requests" library logs noisily, so turn that off
logging.getLogger("requests").setLevel(logging.DEBUG)
logging.debug("DEBUG: Running godaddy_ddns.py");
my_acct = Account(api_key=K, api_secret=S)
client = Client(my_acct)

public_ip = pif.get_public_ip()
logging.debug("DEBUG: Current Public IP '{0}'.".format(public_ip))
dns = socket.gethostbyname(H+"."+D)
logging.debug("DEBUG: current DNS record for {0}.{1} is {2}.".format(H, D, dns))
if public_ip != dns:
    # if the DNS and public IP differ then we may want to update the dns records
    for domain in client.get_domains():
        # since we may have multiple domain only return data for one of them
        if domain == D:
            # get the domain records
            logging.debug("DEBUG: Looking up DNS Records for {0}.".format(domain))
            dns_records = client.get_records(domain, record_type='A')
            # display what we actually got it is a list of 1 or more entries
            logging.debug("DEBUG: Domain '{0}' DNS records: {1}".format(domain, dns_records))
            if len(dns_records) == 0:
                logging.debug("DEBUG: No existing DNS records found for domain {0}.".format(domain))
            else:
                # we have DNS records, but we need to look at which record we actually want
                for dns_record in dns_records:
                    logging.debug("DEBUG: Found existing record in DNS for {0} is '{1}'.".format(dns_record['name'], dns_record['data']))
                    # compare the hostname to what we want to update
                    if dns_record['name'] == H:
                        logging.debug("DEBUG: Found desired record for {0} with an address of {1}.".format(H, dns_record['data']))
                        # we do not need this check as tha was the first one executed, but to be safe do it again
                        if dns_record['data'] == public_ip:
                            # names match nothing needs to be done
                            logging.info("INFO: Public IP A record DNS record for host '{0}' is up to date, and does not need to be updated.".format(H))
                        else:
                            # update is needed for the address
                            logging.info("INFO: Updating A record for {0} ({1}) from address {2} to {3}.".format(dns_record['name'], H+"."+D, dns_record['data'], public_ip))
                            # finally call the function to make teh update to the DNS record, only update and include host and domain as provided by user
                            success = client.update_record_ip(public_ip, D, H, 'A')
                            if success:
                                logging.info("INFO: Domain '{0}': Successfully set public IP to '{1}'.".format(domain, public_ip))
                            else:
                                logging.error("ERROR: Domain '{0}': Unable to update public IP to '{1}'.".format(domain, public_ip))
                                # skip any remaining hosts
                                break
                    else:
                        logging.debug("DEBUG: Skipping unwanted domain entry {0}.".format(dns_record['name']))
                # skip any remaining domains
                break
        else:
            logging.debug("DEBUG: Skipping unwanted Domain {0}.".format(domain))
else:
    # short circuited exit as there was nothing we needed to do, and we did not have to query godaddy
    logging.info("INFO: current DNS record for {0}.{1} is {2} which matches the discovered address of {3}, nothing to do.".format(H, D, dns, public_ip))