#! /usr/bin/env python
# this only works for small files! it loads everything into mem.
import sys
from screed.fasta import fasta_iter
import random

d = dict([ (r['name'], r['sequence']) for r in fasta_iter(open(sys.argv[1])) ])

ks = d.keys()
random.shuffle(ks)

for k in ks:
    s = d[k]

    print '>%s\n%s' % (k, s)