What language do the best AI programmers use?

languages.py

#!/usr/bin/env python2
# coding: utf-8

import json
a=json.load(open("ranking_json.php")) # get at http://aichallenge.org/ranking_json.php
print a.keys()
#print a["values"][8]
#print a["values"][8][18] # skill
#print a["values"][8][22] # games
#print a["values"][8][7] # language
#print a["values"][8][3] # country
#print a["values"][8][12] # ranking

def dic_append(dic,key,value):
    if not dic.has_key(key):
        dic[key] = []
    dic[key].append(value)

keys = { "language" : 7, "country" : 3 }
for key_name, key_index in keys.items():
    groups={}
    for p in a["values"]:
        try:
            if int(p[22]) > 10:
                dic_append(groups,p[key_index],(p[12],p[18],p[3],p[22],p[1]))

        except TypeError:
            pass

    from matplotlib import pylab as pl
    for language,players in groups.items():
        ranks = []
        for ranking,skill,country,games,login in players:
            ranks.append(int(ranking))
            #ranks.append(float(skill))
        if len(ranks) > 10:
            pl.figure()
            pl.hist(ranks,bins=max(10,len(ranks)/20),label=language)
            pl.legend()
            pl.xlabel("Rank")
            pl.ylabel("Number of players")
            pl.savefig("figs/%s_%s.png" % (key_name,language))