dummy.py

import csv
from urllib.parse import parse_qs
import sys
from collections import Counter, defaultdict

counter = defaultdict(Counter)
with open(sys.argv[1]) as f:
    reader = csv.reader(f)
    next(reader)
    for uri, code in reader:
        if code != "200":
            continue
        for key, values in parse_qs(uri.split("?")[1]).items():
            for value in values:
                counter[key][value] += 1

for key in [x for x in counter if x in ["platform", "tool"]]:
    print("KEY:", key)
    rest = 0
    for i, (value, count) in enumerate(counter[key].most_common()):
        if i < 20:
            print(" ", repr(value), count)
        else:
            rest += count
    print("  ALL OTHERS COMBINED", rest)