> from Bio import Align
> aligner = Align.PairwiseAligner()
> seq1 = "GAACT"
> seq2 = "GAT"
> score = aligner.score(seq1, seq2)
> score
3.0
> alignments = aligner.align(seq1, seq2)
> for alignment in alignments:
...     print(alignment)
GAACT
||--|
GA--T
<BLANKLINE>
GAACT
|-|-|
G-A-T
<BLANKLINE>