get_outgoing_number

gistfile1.py

def get_outgoing_number(provider, incoming_number):
    '''
    Returns the outgoing number associated with this incoming number.
    '''
    def get_sms_settings():
        # Memcached closure returns outgoing number for this student
        try:
            settings = SmsSettings.objects.get(phone_number = incoming_number)
        except SmsSettings.DoesNotExist:
            # Create settings record for this number
            outgoing_number = get_provider_outgoing_number(provider)
            safe_call_task(tq_save_sms_settings, 
                    [incoming_number, outgoing_number])
            return outgoing_number

        if settings.sms_reply_number == None:
            # Settings exist but no sms_reply_number has been set.  Set it
            outgoing_number = get_provider_outgoing_number(provider)
            safe_call_task(tq_save_sms_settings,
                    [incoming_number, outgoing_number])
            return outgoing_number
        else:
            return settings.sms_reply_number

    number = get_object_through_memcache("sms_reply_number_%s" %incoming_number, 
                    get_sms_settings,
                    timeout = 120)

    if number:
        # settings exist, and outgoing number exists for setting
        return number
    else:
        # Something bad happened...
        return False

A good improvement, thanks!