Applying Format to Entire Row Openpyxl

Question

I have an Excel File that I want to format. The first row (excluding Headers so row2) should be red and italicized.

the Openpyxl Documentation states:

Answer 1

There is no need to iterate on all of the rows if you only intend to change the colour for the second row, you can just iterate over a single row as follows:

import openpyxl
from openpyxl import load_workbook
from openpyxl.styles import Font

file = 'input.xlsx'
wb = load_workbook(filename=file)
ws = wb['Output']
red_font = Font(color='00FF0000', italic=True)

# Enumerate the cells in the second row
for cell in ws["2:2"]:
    cell.font = red_font

wb.save(filename=file)

Giving you something like:

Accessing multiple cells is described in the openpyxl docs: Accessing many cells

The format "2:2" enumerates the cells over a single row. If "2:3" is used, this will return the cells a row at a time, i.e. row 2 then row 3 and so would need an additional loop.

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Alternatively, to use a NamedStyle:

import openpyxl
from openpyxl import load_workbook
from openpyxl.styles import Font, NamedStyle

file = 'input.xlsx'
wb = load_workbook(filename=file)
ws = wb['Output']

# Create a NamedStyle (if not already defined)
if 'red_italic' not in wb.named_styles:
    red_italic = NamedStyle(name="red_italic")
    red_italic.font = Font(color='00FF0000', italic=True)
    wb.add_named_style(red_italic)

# Enumerate the cells in the second row
for cell in ws["2:2"]:
    cell.style = 'red_italic'

wb.save(filename=file)