Python and GeoIP library.

Let's take a look on sample code:

import pygeoip
import re

gi = pygeoip.GeoIP('/opt/geoIp/GeoLiteCity.dat')
log_file = '/var/log/nginx/access.log'

ip_regex = re.compile(r"\b([0-9]{1,3}\.){3}[0-9]{1,3}\b")

s = set()

def getLocation(ip):
    """doc string"""
    rec = gi.record_by_name(ip)
    print("Target ip:", ip, "located:")
    print("Country code:", str(rec['country_code3']))
    print("Country:", str(rec['country_name']))
    print("City:", str(rec['city']))
    print()

with open(log_file) as f:
    for line in f:
        if 'bot' in line:
            continue
        else:
            a = re.search(ip_regex, line)
            b = a.group()
            s.add(b)

for ip in s:
    getLocation(ip)
    

As result we can see following output:

Target ip: 208.101.7.44 located:
Country code: USA
Country: United States
City: Dallas