old_contents: from pymongo import MongoClient
  from pprint import pprint
  
  client = MongoClient()
  db = client.test
  
  db.properties.drop_indexes()
  db.molecules.drop_indexes()
  
new_contents: from pymongo import MongoClient
  from pprint import pprint
  
  client = MongoClient()
  db = client.test
  
  print "# Properties Documents: " + str(db.properties.count())
  print "# Molecule Documents: " + str(db.molecules.count())
  
  print "Deleting"
  db.properties.drop()
  db.molecules.drop()
  
  print "# Properties Documents: " + str(db.properties.count())
  print "# Molecule Documents: " + str(db.molecules.count())
  
subject: Revert clear_db