Usage:
>>> import nebfa
>>> rec = nebfa.parse(open("./test/data/basic.fa")).next()
>>> rec.id
('gi', '0120123123')
>>> rec.desc
'Some stuff'
>>> rec.sequence
'ACGT'
>>> rec.hash
'2108994E17F6CCA9FF2352ADA92B6511DB076034'
# Alternatively, parse_file avoids the need for a call to open.
>>> for rec in nebfa.parse_file("./test/data/multi.fa"):
... print rec.id
('gi', '0120123123')
('ref', 'YP_234234.2')
Records also have a meta attribute that has two keys for identifiers and descriptions. You will need to consult that member when you have Ctl-A separated deflines. If you have a better syntax suggestion please send a note along.