Scrap a value from website

[harsush]

Iam trying scrap trade date value -- below is what i have written, but not getting the value. Can someone help on this.

#!/usr/bin/env python
import urllib2, json
ua = { 'User-Agent' : 'Mozilla/5.0' }
request = urllib2.Request('http://www.cmegroup.com/CmeWS/mvc/TimeandSales/300/G/N8?timeSlot=16&entryDate=20180522&pageNumber=1&_=1527157308610', headers=ua)
response = urllib2.urlopen(request)
data = json.loads(response.read())
response.close()
print data['tradeDate']

[snippsat]

Use Requests,and stop using Python 2.

import requests

url = 'https://www.cmegroup.com/CmeWS/mvc/TimeandSales/300/G/N8?timeSlot=16&entryDate=20180522&pageNumber=1&_=1527157308610'
response = requests.get(url).json()

Output:
>>> response
{'entries': [],
 'productDescription': 'Corn Futures Jul 2028 Globex',
 'props': {'pageNumber': 1, 'pageSize': 100, 'pageTotal': 0},
 'tradeDate': '-'}

>>> response['tradeDate']
'-'