IOS-Facebook Blank white screen after app is authorized?

I am upgrading from Parse v1.6.4 to the latest version and also i am upgrading facebook ios sdk to v4.7. The problem...

Python's json.load(sys.stdin) gets me u'…' instead of double quotes around Strings?

When I do: import sys, json; import requests headers = {'Content-Type': 'application/json', 'X-Parse-Applic...