Convert nirsoft country .csv ip ranges to nmap target selection format

country2nmap.py

# I am not responsible &c
# RCJ 2014
import sys
import requests

url = 'http://www.nirsoft.net/countryip/' + sys.argv[1] + '.csv'

r = requests.get(url)
if r.status_code != 200:
    print "Bad country code: " + sys.argv[1]
    sys.exit()

ifile = r.text.split('\r\n')
ofile = open(sys.argv[1] + '.nmap', 'w+')

for line in ifile:
    if line == '':
        continue

    fields = line.split(',')
    host1 = fields[0]
    host2 = fields[1]

    octets1 = host1.split('.')
    octets2 = host2.split('.')

    result = []
    for octet1, octet2 in zip(octets1, octets2):
        if octet1 != octet2:
            result.append(octet1 + '-' + octet2)
        else:
            result.append(octet1)

    ofile.write('.'.join(result) + '\n')

ofile.close()