help with bio perl

[bio_informatics]

Hi,
I am handling different formats of Multiple sequence alignment files.
I can get the format of file by

my $format_guess = (new Bio::Tools::GuessSeqFormat( -file => $ARGV[0]))->guess;

but when I try to get sequence of different protein, I cannot get it.
I have some 10 accession ids, but unable to fetch it.

./perl_cript.pl file_multple_alg

I am trying to run the script with above command in Linux, terminal

my $in  = Bio::AlignIO->new(-file   => $ARGV[0] ,
                             -format => $format_guess);

OR

while ( my $aln = $in->next_aln() ) {
       print $aln,"\n";
   
}

I get address of objects.
I want to fetch aligned sequence of each accession/protein.

I want to print on screen not to pass to some out file.

Any help shall be appreciated.
Thanks.

[TiborNagy]

Try this tutorial:

http://raven.iab.alaska.edu/~ntakebay/teaching/programming/bioperl/node2.html

[SES]

The short answer is that you are printing an object, and you need to call a method on that object to get what you want. Check out the BioPerl HOWTOs for a quick overview of some of the most used parts of BioPerl.

[bio_informatics]

Thank you for your help.