Finally a Clean HTTP Get for Xively Data Part 2

import json
import urllib2
import httplib2

xivelyhost = 'api.xively.com'     # this is the base URL for Xively's API feeds
feedurl = '/v2/feeds/1703619548'  # this is the part of the URL that includes your feed ID number
                                  # we tack this chunk together with the xivelyhost URL
url = "http://api.xively.com/v2/feeds/1703619548"
#feedid = '170361954' # we aren't going to use this directly... but later we just might
apikey = 'EsTjqWQlHyj69kBKBYbtoanldlKxAb7HalVxzW5ef2V5x296' # Your Read-Only Key!

#
# Example 1: Pulling JSON Feed from my read-only APIKey URL
#
headers = {"Content-type": "application/x-www-form-urlencoded", "Accept": "application/json", "X-ApiKey": apikey}
    # In order to authenticate with Xively we have to preload some stuff in the HTTP packet -- namely headers
    # Our request is the same type of request a server expects from, say, a web form -- more on this soon
http = httplib2.Http()
response, content = http.request(url, 'GET', headers=headers)
    # Simple -- we get back whatever data the web server is going to give us!
print(response.status, response.reason)
    # Part of the info we get back is response / status... you may know this as something like HTTP 404 ;-)
    # Really we just do squat with this information -- for now
#print(content)
eggdata = json.loads(content)
    # We use some magic to turn JSON text into a dictionary
    # You shouldn't leave this as total magic, though -- print out the variable 'response' and see what's in it!

print("Example 1")
#print(eggdata)
#or datastream in eggdata['datastreams']:
#   print("{")
#   for key in datastream:
#       print key,datastream[key]
#   print("}")

datastream_keys = ('CO','Dust','NO2','Temperature','Humidity')
eggdict = {datastream['id'] : datastream['current_value'] for datastream in eggdata['datastreams'] if (datastream['id'] in datastream_keys)}

print(eggdict)