Visualize VDCB breach discovery_method data really quick

# See https://github.com/vz-risk/VCDB/tree/master/data/joined 

import json
import pandas as pd
from collections import Counter

with open('vcdb.json') as f:
    vcdb = json.loads(f.read())

variety = []
for inc in vcdb:
    [variety.append(v['variety'][0]) for k, v in inc.get('discovery_method').items() if k == "internal"]

count = Counter(variety)
df = pd.DataFrame.from_dict(count, orient='index')
df.plot(kind='bar')