Automating formula to value in libreoffice via uno in python

When working with LibreOffice and Python, it is often necessary to automate formulas and values. In this article, we will explore three different ways to achieve this using the UNO module in Python.

Option 1: Using the uno module directly

import uno

# Connect to LibreOffice
localContext = uno.getComponentContext()
resolver = localContext.ServiceManager.createInstanceWithContext("com.sun.star.bridge.UnoUrlResolver", localContext)
context = resolver.resolve("uno:socket,host=localhost,port=2002;urp;StarOffice.ComponentContext")
desktop = context.ServiceManager.createInstanceWithContext("com.sun.star.frame.Desktop", context)

# Open a new Calc document
calcDoc = desktop.loadComponentFromURL("private:factory/scalc", "_blank", 0, ())

# Get the first sheet
sheets = calcDoc.getSheets()
sheet = sheets.getByIndex(0)

# Set a formula in cell A1
cell = sheet.getCellByPosition(0, 0)
cell.setFormula("=SUM(B1:B10)")

# Calculate the formula
calcDoc.calculateAll()

# Get the value from cell A1
value = cell.getValue()

# Print the result
print(value)

This option uses the uno module directly to connect to LibreOffice, open a new Calc document, set a formula in a cell, calculate the formula, and retrieve the value. It provides a straightforward and efficient solution.

Option 2: Using the pyuno module

import pyuno

# Connect to LibreOffice
localContext = pyuno.getComponentContext()
resolver = localContext.ServiceManager.createInstanceWithContext("com.sun.star.bridge.UnoUrlResolver", localContext)
context = resolver.resolve("uno:socket,host=localhost,port=2002;urp;StarOffice.ComponentContext")
desktop = context.ServiceManager.createInstanceWithContext("com.sun.star.frame.Desktop", context)

# Open a new Calc document
calcDoc = desktop.loadComponentFromURL("private:factory/scalc", "_blank", 0, ())

# Get the first sheet
sheets = calcDoc.getSheets()
sheet = sheets.getByIndex(0)

# Set a formula in cell A1
cell = sheet.getCellByPosition(0, 0)
cell.setFormula("=SUM(B1:B10)")

# Calculate the formula
calcDoc.calculateAll()

# Get the value from cell A1
value = cell.getValue()

# Print the result
print(value)

This option uses the pyuno module, which is a Python wrapper for the UNO API. It provides a more Pythonic interface to interact with LibreOffice. The code is similar to Option 1, but with the pyuno module instead of the uno module.

Option 3: Using the unoconv command-line tool

import subprocess

# Run the unoconv command-line tool
output = subprocess.check_output(["unoconv", "-f", "csv", "input.ods"])

# Parse the output to get the value from cell A1
lines = output.decode("utf-8").split("n")
value = lines[0].split(",")[0]

# Print the result
print(value)

This option uses the unoconv command-line tool to convert the LibreOffice document to CSV format and extract the value from cell A1. It is a more indirect approach compared to the previous options, but it can be useful if you prefer working with command-line tools or need to automate the process outside of Python.

Among the three options, Option 1 and Option 2 are better choices as they provide direct access to the UNO API and offer more flexibility in interacting with LibreOffice. Option 3 can be useful in certain scenarios, but it adds an extra layer of complexity by relying on an external tool.

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2 Responses

  1. Option 2 seems way cooler and more Pythonic. Who needs command-line tools when you can code it yourself? #PythonPower

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