Looking at the code to Graph, it uses Data::Dumper as for deep copying and dumping. You should therefore be able to dump a Graph object using

sub write_out {
    my $graph = shift;
    my $file = 'graph.dump';
    open my $out', '>', $file or die "Cannot open $file for output: $!
+\n";
    print $out $graph->_dump;
    close $out or die "Could not close output $file: $!\n";
}

[download]

and then you should be able to read it back in again with:

sub read_in {
    my $file = 'graph.dump';
    open my $in', '<', $file or die "Cannot open $file for input: $!\n
+";
    my $Graph;
    local $/ = undef;
    # eval {  <$in> }; # sets $Graph
    eval <$in>; # sets $Graph
    close $in;
    return $Graph;
}

[download]

As an added bonus, the serialised structure is readable (for some definition of readadble...)

update: string eval, not block eval. Note: you want do this only in a trusted environment. String eval is not something to be used lightly.

• another intruder with the mooring in the heart of the Perl

In reply to Re: storing Graphs created with Graph.pm by grinder
in thread storing Graphs created with Graph.pm by nosbod

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.