first_querry_by_ip.py

from sys import argv

# tab separated input from processing apache logs with awk to just have relevant fields and tab separation

ips = set()
with file(argv[1]) as f:
    for line in f:
        ip, date, url = line.split('\t')
        if ip not in ips:
            print "%s\t%s" % (ip, date)
        ips.add(ip)