from boto.sdb.connection import SDBConnection

c = SDBConnection('mykeyid', 'mykeypass', proxy='myproxy', proxy_port='3128', proxy_user='auser', proxy_pass='apassword')
c.get_all_domains()
#>>> [Domain:my_domain]

d = c.get_domain('my_domain')

for i in d.select('select * from my_domain'):
    print i
#>>> {u'title': u'SOA Governance'}

for i in d.select('select * from my_domain'):
    i.add_value('author', 'erl')
    i.save(replace=True)

for i in d.select('select * from my_domain'):
    print i
#>>> {u'author': u'erl', u'title': u'SOA Governance'}