0: #!/usr/bin/perl -w
1: 
2: use strict;
3: use Bio::DB::GenBank;
4: use Bio::SeqIO;
5: use File::Basename;
6: 
7: # configuration information
8: my $outfile  = 'outfile';
9: my $progname = basename $0;
10: 
11: # usage information
12: my $usage = "usage:  $0 accession1 [accession2 ...]\n";
13: die $usage unless @ARGV;
14: 
15: # start program flow
16: my $gb = new Bio::DB::GenBank( 
17:    -retrievaltype => 'tempfile', 
18:    -format => 'Fasta'
19: );
20: 
21: my $seqout = Bio::SeqIO->new( -file => ">$outfile", -format => 'FASTA' );
22: 
23: my $seqio = $gb->get_Stream_by_acc( @ARGV );
24: while( my $sequence =  $seqio->next_seq ) {
25:    $seqout->write_seq($sequence);
26: }