import json
import re
from bs4 import BeautifulSoup  # $ pip install beautifulsoup4

html = //Your html output
soup = BeautifulSoup(html)
script = soup.find('script', text=re.compile('json1'))
json_text = re.search(r'^s*json1s*=s*({.*?})s*;s*$',
                        script.string, flags=re.DOTALL | re.MULTILINE).group(1)
data = json.loads(json_text)
print(data['json1'])