Python ipaddress package notes

import ipaddress

def type_of_remote_host(remote_host):
    try:
        addr = ipaddress.ip_address(unicode(address))
        if addr.version == 4:
            return 'ipv4addr'
        else:
            return 'ipv6addr'

    except ValueError:
        return 'other'

import ipaddress

ipaddress.ip_address(u'2001:0db8:0000:0000:0000:0000:0000:9abc').compressed
# => u'2001:db8::9abc'

ipaddress.ip_address(u'2001:db8::9abc').exploded
# => '2001:0db8:0000:0000:0000:0000:0000:9abc'

import ipaddress

## IPv4
'.'.join(reversed('192.168.0.1'.split('.')))+'.in-addr.arpa.'
# => '1.0.168.192.in-addr.arpa.'

## IPv6
'.'.join(reversed(ipaddress.ip_address(u'2001:db8::9abc').exploded.replace(':','')))+'.ip6.arpa.'
# => 'c.b.a.9.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa.'

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