fields = ['first-name', 'last-name', 'email-address', 'phone-number']
values = ['John', 'Doe', 'john.doe@johndoe.com', '1-800-123-4567']

{
    'first-name':'John',
    'last-name':'Doe',
    'email':'john.doe@johndoe.com',
    'phone-number':'1-800-123-4567'
}

def getFirstName(self, lastname):
    client = MongoClient()
    db = client.test.contacts
    result db.find({ 'last-name':lastname })
    return result['first-name']

self.getFirstName("Doe")