V26.3.1

Release Notes

v26.3.1 — 2026-03-11

Breaking Changes

Package Namespace Restructured

The import path has changed from the flat aspose_cells module to the aspose.cells_foss namespace package.

Before (≤ v26.3.x):

from aspose_cells import Workbook

After (v26.5.1+):

from aspose.cells_foss import Workbook

This aligns the package with the Aspose namespace convention and makes it consistent with the PyPI package name aspose-cells-foss. All public classes, enums, and helpers remain identical — only the import path changes.

Migration steps:

1. Upgrade the package:

   pip install --upgrade aspose-cells-foss

2. Replace all imports in your project:

   # Linux / macOS
   sed -i 's/from aspose_cells import/from aspose.cells_foss import/g' **/*.py
   
   # Windows PowerShell
   Get-ChildItem -Recurse -Filter *.py | ForEach-Object {
       (Get-Content $_.FullName) -replace 'from aspose_cells import', 'from aspose.cells_foss import' |
       Set-Content $_.FullName
   }

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Improvements

• Examples: All files in examples/ updated to use the new aspose.cells_foss import path.
• Package structure: Source tree reorganised as a proper namespace package (aspose/cells_foss/) so that import aspose and from aspose.cells_foss import … both resolve correctly.

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Full Feature Set (unchanged from v26.3.0)

All features introduced in v26.3.0 are fully available:

Feature	Description
Charts	16 chart types (Line, Bar, Pie, Area, Scatter, Waterfall, Combo, Stock, Surface, Radar, Treemap, Sunburst, Histogram, Funnel, Box & Whisker, Map)
Pictures	Embedded images (JPEG, PNG, GIF, BMP, TIFF) anchored between cells
Drawing Shapes	30+ preset geometries with fill, line, text, and font formatting
Sparklines	LINE, COLUMN, WIN_LOSS types with full color customisation
Excel Tables	Structured ListObject tables with styles and auto-filter
Manual Page Breaks	Horizontal and vertical page breaks with add/remove/clear
Formula Evaluator	Basic formula evaluation for cells without cached values
Merge Cells	merge / unmerge with round-trip persistence
Print Area	page_setup.print_area persisted via defined names
Data Validation	Dropdown lists, number ranges, date, text length, custom rules
Conditional Formatting	Rules-based cell formatting
Hyperlinks	URL, email, file, and internal references
Comments	Rich-text comments with author
Auto-Filter	Filtering on data ranges
Protection	Workbook structure and worksheet cell protection
Encryption	AES password protection on save/open
Document Properties	Title, author, subject, and custom properties
CSV / JSON / Markdown	Multi-format export via SaveFormat enum