bioperl

#! /usr/bin/perl
use Bio::SeqIO;
my $in=Bio::SeqIO->new(-file=>'/home/XXX/XXX/all.pep.fa',-format=>'fasta');
my $i=0;
while((my $s=$in->next_seq)&&($i <=10))
{  my $id=$s->id;
my $seq=$s->seq;
$i++;
my $name=$s->display_name;
my $len=$s->length;
print "$id\n$seq\n$name\n$len\n";
}