How to Save Files with Aspose.Cells FOSS

Problem

Save a workbook created or modified with Aspose.Cells FOSS to disk in XLSX, CSV, or Markdown format. The Workbook.save() method writes the file and infers the format from the file extension. Use save_as_markdown() for Markdown export.

from aspose.cells_foss import Workbook

workbook = Workbook()
worksheet = workbook.worksheets[0]
worksheet.cells.get("A1").put_value("Product")
workbook.save("output.xlsx")

Prerequisites

To use Aspose.Cells FOSS for saving files in Python, ensure your environment meets the following requirements.

Python 3.7 or later installed on your system
Install Aspose.Cells FOSS using: pip install aspose-cells-foss>=26.3.1
Import the library with from aspose.cells_foss import Workbook to access Workbook and Worksheet classes
A valid workbook instance loaded from a file or created programmatically

Saving the File

Aspose.Cells FOSS provides straightforward methods to save workbooks to various formats. Call save() on a Workbook instance with the desired output file path. The format is inferred from the extension: .xlsx produces an Excel Open XML file, .csv produces a comma-separated values file, and .md is not supported by save(); use save_as_markdown() instead.

from aspose.cells_foss import Workbook

# Load or create a workbook
workbook = Workbook("input.xlsx")

# Save as XLSX
workbook.save("output.xlsx")

# Save as CSV
workbook.save("output.csv")

# Export as Markdown
workbook.save_as_markdown("output.md")

Code Example

This example creates a workbook, writes sample data using the correct get().put_value() pattern, and saves the result to both XLSX and Markdown formats.

from aspose.cells_foss import Workbook

# Create a new workbook and get the first worksheet
workbook = Workbook()
worksheet = workbook.worksheets[0]

# Populate sample data using the correct put_value pattern
worksheet.cells.get("A1").put_value("Product")
worksheet.cells.get("B1").put_value("Sales")
worksheet.cells.get("A2").put_value("Apples")
worksheet.cells.get("B2").put_value(120)
worksheet.cells.get("A3").put_value("Bananas")
worksheet.cells.get("B3").put_value(95)

# Save to XLSX
workbook.save("output.xlsx")

# Export to Markdown
workbook.save_as_markdown("output.md")

print("Saved output.xlsx and output.md")

Output Options

Aspose.Cells FOSS supports saving workbooks to multiple formats. Format selection is determined by the file extension passed to save(), or by calling the dedicated save_as_markdown() method.

Format	Method / Extension	Notes
XLSX	`wb.save("file.xlsx")`	Default Excel Open XML format; supports styles, charts, and formulas
CSV	`wb.save("file.csv")`	Comma-separated values; single-sheet export
Markdown	`wb.save_as_markdown("file.md")`	Exports first worksheet as a Markdown table