Iterate through PyMongo Cursor as key-value pair

Is it possible to iterate over a pymongo Cursor as a key-value pair like a dict? I'm using python 2.6 and pymongo 1.9.

I've tried this:

import pymongo
mongo = pymongo.Connection('localhost')
mongo_db = mongo['my_database']
mongo_coll = mongo_db['my_collection']
cursor = mongo_coll.find()
records = dict([(record_id, record) for record_id, record in mongo_cursor])

But I get the error:

ValueError: too ma开发者_如何学Gony values to unpack

Try:

records = dict((record['_id'], record) for record in cursor)

this is a fuction in python I used to build a JSON response from a MongoDB cursor

def build_contacts_cursor(cursor):
    ''' Builds a JSON response for a given cursor
    '''
    response = json.loads('{}')
    response_to_append_to = response['results'] = []

    for idx, bp in enumerate(cursor):
        response_to_append_to.append(bp)

    return response