for post in db.datasets.find({"test_set":"abc"}).sort("abc",pymongo.DESCENDING).skip((page-1)*num).limit(num):
for post in db.datasets.find({"test_set":"abc"}for post in db.datasets.find({"test_set":"abc"}).sort("abc",pymongo.DESCENDING).skip((page-1)*num).limit(num):
for post in db.datasets.find({"test_set":"abc"}