import urllib, json
from sys import argv

script, purchase_code = argv


"""
Remove lines 10,11 if you don't wish to extract the credentials from a file.
And don't forget to replace "username" and "apikey" from line 14 & 15.
"""
with open('credentials.txt','r') as f:
    lines = ([line.rstrip() for line in f])

username = lines[0] #-> credentials.txt, line1 should contain your username
apikey = lines[1] #-> credentials.txt, line2 should contain your API key

link = ('http://marketplace.envato.com/api/edge/%s/%s/verify-purchase:%s.json')%(username, apikey, argv[1])
req = urllib.urlopen(link)
res = req.read()
ans = json.loads(res)
print json.dumps(ans, sort_keys = True, indent = 4, separators=(',',': '))