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A Raku module for working with Excel spreadsheets (XLSX format), both reading existing files, creating new files, or modifying existing files and saving the changes. Of note, it:

  • Knows how to lazily load sheet content, so if you don't look at a sheet then time won't be spent deserializing it (down to a cell level, even)
  • In the modification scenario, tries to leave as much intact as it can, meaning that it's possible to poke data into a sheet more complex than could be produced by the module from scratch
  • Only depends on the Raku LibXML and Libarchive modules (and their respective native dependencies)

This module is currently in development, and supports the subset of XLSX format features that were immediately needed for the use-case it was built for. That isn't so much, for now, but it will handle the most common needs:

  • Enumerating worksheets
  • Reading text and numbers from cells on a worksheet
  • Creating new workbooks with worksheets with text and number cells
  • Setting basic styles and number formats on cells in newly created worksheets
  • Reading a workbook, making modifications, and saving it again
  • Reading and writing column properties (such as column width)


Reading existing workbooks

use Spreadsheet::XLSX;

# Read a workbook from an existing file (can pass IO::Path or a
# Blob in the case it was uploaded).
my $workbook = Spreadsheet::XLSX.load('accounts.xlsx');

# Get worksheets.
say "Workbook has {$workbook.worksheets.elems} sheets";

# Get the name of a worksheet.
say $;

# Get cell values (indexing is zero-based, done as a multi-dimensional array
# indexing operation [row ; column].
my $cells = $workbook.worksheets[0].cells;
say .value with $cells[0;0];      # A1
say .value with $cells[0;1];      # B1
say .value with $cells[1;0];      # A2
say .value with $cells[1;1];      # B2

Creating new workbooks

use Spreadsheet::XLSX;

# Create a new workbook and add some worksheets to it.
my $workbook =;
my $sheet-a = $workbook.create-worksheet('Ingredients');
my $sheet-b = $workbook.create-worksheet('Matching Drinks');

# Put some data into a worksheet and style it. This is how the model
# actually works (useful if you want to add styles later).
$sheet-a.cells[0;0] = => 'Ingredient');
$sheet-a.cells[0;0].style.bold = True;
$sheet-a.cells[0;1] = => 'Quantity');
$sheet-a.cells[0;1].style.bold = True;
$sheet-a.cells[1;0] = => 'Eggs');
$sheet-a.cells[1;1] = => 6);
$sheet-a.cells[1;1].style.number-format = '#,###';

# However, there is a convenience form too.
$sheet-a.set(0, 0, 'Ingredient', :bold);
$sheet-a.set(0, 1, 'Quantity', :bold);
$sheet-a.set(1, 0, 'Eggs');
$sheet-a.set(1, 1, 6, :number-format('#,###'));

# Save it to a file (string or IO::Path name).

# Or get it as a blob, e.g. for a HTTP response.
my $blob = $;


Thanks goes to Agrammon for making the development of this module possible. If you need further development on the module and are willing to fund it (or other Raku ecosystem work), you can get in contact with Edument or Oetiker+Partner.


Work with Excel (XLSX) spreadsheets in Raku.







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