codeforces tags distribution

codeforces tags

import json
import urllib2
url = "http://codeforces.com/api/problemset.problems"
data = json.dumps({})
req = urllib2.Request(url, data, {'Content-Type': 'application/json'})
f = urllib2.urlopen(req)
response = f.read()
f.close()

data = json.loads(response)

counter = dict()
problems = data["result"]["problems"]
for problem in problems:
    if "tags" in problem:
        for tag in problem["tags"]:
            if not tag in counter:
                counter[tag] = 0
            counter[tag] += 1
            

import operator
sorted_x = sorted(counter.items(), key=operator.itemgetter(1), reverse=True)

for line in sorted_x:
    print line[0] + '	' + str(line[1])