gathers the DEVTOOLS Telemetry Histograms

devtools-telemetry-metrics.py

import json
from functools import cmp_to_key
import locale
import urllib2

local_fname = 'Histograms.json'
url = 'https://hg.mozilla.org/mozilla-central/raw-file/tip/toolkit/components/telemetry/Histograms.json'
req = urllib2.Request(url)
response = urllib2.urlopen(req)

f = open(local_fname, 'w')
f.write(response.read())
f.close()

with open(local_fname) as data_file:
    data = json.load(data_file)

keys = sorted([item for item in data], key=cmp_to_key(locale.strcoll))
for item in keys:
    if item.startswith('DEVTOOLS'):
        print item