PPTX

PPTX Skill

This skill enables programmatic creation and modification of PowerPoint presentations (.pptx) using Python.

Core Capabilities

1. Create New Presentations: Generate structured slide decks from templates or scratch.
2. Modify Existing Decks: Update text, replace images, or add new slides to existing files.
3. Read Content: Inspect slide layouts, shapes, and text content.

Dependencies

• python-pptx (pip install python-pptx)
• Pillow (pip install Pillow) for image handling

Workflows

1. Creating a New Presentation

from pptx import Presentation
from pptx.util import Inches

prs = Presentation()

# Title Slide
title_slide_layout = prs.slide_layouts[0]
slide = prs.slides.add_slide(title_slide_layout)
title = slide.shapes.title
subtitle = slide.placeholders[1]
title.text = "Hello World"
subtitle.text = "Generated by python-pptx"

# Content Slide
bullet_slide_layout = prs.slide_layouts[1]
slide = prs.slides.add_slide(bullet_slide_layout)
shapes = slide.shapes

title_shape = shapes.title
body_shape = shapes.placeholders[1]

title_shape.text = 'Key Points'
tf = body_shape.text_frame
tf.text = 'First bullet point'
p = tf.add_paragraph()
p.text = 'Second bullet point'
p.level = 1

prs.save('output.pptx')

2. Modifying an Existing Presentation

from pptx import Presentation

prs = Presentation('template.pptx')

# Modify Title on first slide
if prs.slides[0].shapes.title:
    prs.slides[0].shapes.title.text = "Updated Title"

# Add a valid image to slide 2 (if exists)
img_path = 'image.png'
if len(prs.slides) > 1:
    slide = prs.slides[1]
    left = top = Inches(1)
    slide.shapes.add_picture(img_path, left, top)

prs.save('modified.pptx')

3. Reading and Analyzing

from pptx import Presentation

prs = Presentation('input.pptx')

print(f"Total Slides: {len(prs.slides)}")
for i, slide in enumerate(prs.slides):
    print(f"Slide {i+1} Shapes:")
    for shape in slide.shapes:
        if shape.has_text_frame:
            print(f"  - Text: {shape.text}")

Best Practices

• Templates: Use existing templates (.pptx files) for complex layouts rather than creating shapes from scratch.
• Placeholders: Identify placeholders by index (prs.slide_layouts[n]) or name.
• Images: Ensure images are available locally before insertion.