So you want to be able to reference specific values with inputting keys? If i think i know what you want to do, this should help you get started. You will need the libraries urlllib2, json, and bs4. just pip install them its easy.
import urllib2
import json
from bs4 import BeautifulSoup
url = urllib2.urlopen("https://www.govtrack.us/data/congress/113/votes/2013/s11/data.json")
content = url.read()
soup = BeautifulSoup(content, "html.parser")
newDictionary=json.loads(str(soup))
I used a commonly used url to practice with.