Modifying the font in a Word document can significantly impact its visual appearance and overall readability. Whether you want to enhance the document's style or align it with specific formatting requirements, changing the font is a straightforward process that allows you to customize your text. In this article, you will learn how to change font of a paragraph or a piece of text in a Word document in Python using Spire.Doc for Python.

• Change the Font of a Paragraph in Python
• Change the Font of Specific Text in Python

Install Spire.Doc for Python

This scenario requires Spire.Doc for Python and plum-dispatch v1.7.4. They can be easily installed in your Windows through the following pip command.

pip install Spire.Doc

If you are unsure how to install, please refer to this tutorial: How to Install Spire.Doc for Python on Windows

Change the Font of a Paragraph in Python

Using Spire.Doc for Python, you can create a ParagraphStyle object which defines the font information that can be applied to a certain paragraph. The following are the steps to change the font of a paragraph.

• Create a Document instance.
• Load a Word document using Document.LoadFromFile() method.
• Get a specified section through Document.Sections[index] property.
• Get a specified paragraph that you want to change the font through Section.Paragraphs[index] property.
• Create a ParagraphStyle instance, specifying the font name, font color and font style through the properties under it.
• Add the style to the document using Document.Styles.Add() method.
• Apply the style to the paragraph using Paragraph.ApplyStyle() method.
• Save the result document using Document.SaveToFile() method.

from spire.doc import *
from spire.doc.common import *

# Create a Document instance
document = Document()

# Load a Word document
document.LoadFromFile('C:/Users/Administrator/Desktop/input.docx')

# Get the first section
section = document.Sections[0]

# Get a specific paragraph
paragraph = section.Paragraphs[2]

# Create a paragraph style
style = ParagraphStyle(document)
style.Name = 'NewStyle'
style.CharacterFormat.Bold = True
style.CharacterFormat.Italic = True
style.CharacterFormat.TextColor = Color.get_Red()
style.CharacterFormat.FontName = 'Cambria'
document.Styles.Add(style)

# Apply the style to the paragraph
paragraph.ApplyStyle(style.Name)

# Save the result document
document.SaveToFile('output/ChangeFontOfParagraph.docx', FileFormat.Docx)

Change the Font of Specific Text in Python

To change the font of specific text (letter, phrase or sentence) in a Word document, you need first to find the text from the document and then set a different color or font style for it. The following are the detailed steps.

• Create a Document instance.
• Load a Word document using Document.LoadFromFile() method.
• Find the text that you want to change font color using Document.FindAllString() method.
• Loop through all occurrences of the searched text and change the font color or style for each occurrence through the properties under TextSelection.GetAsOneRange().CharacterFormat object.
• Save the result document using Document.SaveToFile() method.

from spire.doc import *
from spire.doc.common import *

# Create a Document instance
document = Document()

# Load a Word document
document.LoadFromFile('C:/Users/Administrator/Desktop/input.docx')

# Find the text that you want to change font
textSelections = document.FindAllString('programming language', False, True)

# Change the font style of the text
for selection in textSelections:
    selection.GetAsOneRange().CharacterFormat.TextColor = Color.get_Red()
    selection.GetAsOneRange().CharacterFormat.Bold = True

# Save the result document
document.SaveToFile('output/ChangeFontOfText.docx', FileFormat.Docx)

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.