Python openpyxl – Center align cell in spreadsheet

In this post we will be creating a Python script that will center align a cell within an existing Excel spreadsheet using the openpyxl library. Openpyxl is a library that allows us to interact with Excel files in Python. It provides a range of tools for reading, writing, manipulating, and formatting Excel data. This makes it a useful tool for data analysis and reporting tasks.

See the sample of Python code below where we use the openpyxl library to center align particular cells within an already existing Excel spreadsheet. We start by loading our existing Excel file called example.xlsx and assign it to a variable named workbook. Next we retrieve the active worksheet from the workbook. We then select cell A1 of the worksheet and assign it to the variable cell. Now we set the alignment of the cell object to be centered horizontally. Finally the changes made to the Excel file are saved using the save() method.

import openpyxl
from openpyxl.styles import Font, Alignment

workbook = openpyxl.load_workbook('example.xlsx')

worksheet = workbook.active

cell = worksheet['A1']
cell.alignment = Alignment(horizontal='center')

workbook.save('example.xlsx')

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