[postfuturist]

Good suggestion. Also, the quotes aren't necessary on the keys of the keyword arguments:

  collection = Transaction.search(
      order_id__starts_with='a2d',
      customer_website__ends_with='.com',
      billing__first_name__exact='John',
      status__in=[
        Transaction.Status.Authorized,
        Transaction.Status.Settled
      ],
      amount__between=("10.00", "20.00")
  )