[BioPython] SeqUtils.antiparallel function

[cgw501 at york.ac.uk]

Hi,

I am parsing whole-chromosome genbank files, and need to get the reverse 
complement of some of the sequence. Here's what I get trying things out in 
the interpreter.

>>> x= 'atattatatat'
>>> from Bio.Seq import Seq
>>> a = Seq(x)
>>> from Bio.SeqUtils import antiparallel
>>> b = antiparallel(a)
Traceback (most recent call last):
  File "<pyshell#9>", line 1, in ?
    b = antiparallel(a)
  File "C:\Python24\Lib\site-packages\Bio\SeqUtils\__init__.py", line 49, 
in antiparallel
    s = complement(seq)
  File "C:\Python24\Lib\site-packages\Bio\SeqUtils\__init__.py", line 38, 
in complement
    return seq.translate(_ttable)
AttributeError: Seq instance has no attribute 'translate'

Not sure what I'm doing wrong. Thanks,

Chris