python 2.7 - RDS - boto - how to get results from read_replica_dbinstance_identifiers? -

according understanding of boto.rds.dbinstance class, should able variable named read_replica_dbinstance_identifiers object, cannot , don't understand why. know doing wrong.

when run rds-describe-db-instances --quiet --show-xml can find read replicas in xml:

<readreplicadbinstanceidentifiers>   <readreplicadbinstanceidentifier>my-dbinstance-id-1</readreplicadbinstanceidentifier>   <readreplicadbinstanceidentifier>my-dbinstance-id-2</readreplicadbinstanceidentifier> </readreplicadbinstanceidentifiers> 

but when use boto same information test script 1 below, get:

attributeerror: 'dbinstance' object has no attribute 'read_replica_dbinstance_identifiers' 

the script looks this:

import boto dbinstanceid = 'my-dbinstance-id' rds = boto.connect_rds() instances = rds.get_all_dbinstances(dbinstanceid) in instances:     property, value in vars(i).iteritems():         print property, ": ", value print "============================="  print i, " ", i.id print "connection: ", i.connection print 'db instance identifiers: ', i.readreplicadbinstanceidentifiers print i.read_replica_dbinstance_identifiers 

my version of boto, according pip is:
name: boto
version: 2.9.7
location: /library/python/2.7/site-packages

have tried using read_replica_dbinstance_identifiers method instead?

if reading correctly have pulled down instances in array , looping through them each 1 'i'

so should able to: print i.read_replica_dbinstance_identifiers or similar

if ever stuck problems this:

print dir(i) #is useful see possible on object

now go , implement tags rds :-( loooooong!