Downloads the current iana.org port assignment csv and returns a list of 'Unassigned' ports in the 'User' range (>1024)

AvailablePorts.py

import csv
import requests
import logging

def getAvailUserPorts(url='http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv', minport=1024):
	""" Downloads the current iana.org port assignment csv and returns a list of 'Unassigned' ports in the 'User' range (>1024)"""
	logging.info("Downloading: '%s'" % url)
	logging.info("This could take awhile...")
	raw = requests.get(url)
	reader = csv.reader(raw.iter_lines(), delimiter=',')
	portList = []
	logging.info("Generating portList...")
	for row in reader:
		if 'Unassigned' in row:
			if '-' in row[1]: # if port range
				if int(row[1].split('-')[0]) > minport: # if range is in 'user' port range
					for i in range(int(row[1].split('-')[0]), int(row[1].split('-')[1])):
						portList.append(i)
			elif int(row[1]) > minport: # if range is in private port range
				portList.append(row[1])
	logging.info("Found %s 'Unassigned' ports > %s" % ( str(len(portList)), str(minport)) )
	return portList

if __name__ == "__main__":
	logging.basicConfig(format='[%(asctime)s] %(message)s', datefmt="%Y-%m-%d %H:%M:%S", level=logging.DEBUG)
	logging.info(getAvailUserPorts())