use Data::Structure::Util qw(get_refs utf8_on); sub _perl_to_python_utf8_on { # We need to convert the hash keys ourselves. # 'get_refs' digs through the data structure # and returns an array ref of every reference # in the structure, at all levels. # All Hail CPAN; so glad I didn't have to walk # the data myself. my $refs = get_refs( $_[0] ); # For each ref, process just the hashes. for my $ref ( @{$refs} ) { if ( ref($ref) eq 'HASH' ) { for my $key ( keys %$ref ) { # See text below. $ref->{ utf8_on($key) } = $ref->{$key}; } } } # Let the utility convert everything else. return utf8_on( $_[0] ); }