How to create slides for powerpoint with Python

This is an improvement of some code I made to use powerpoint with python

from pptx import Presentation
import os

pres = Presentation()

# Slides layout types
def style(x):
    ''' returns a slide_layout '''
    return pres.slide_layouts[x]


def add_slide(layout, title, content):
    ''' add a slide with layout style = x)  '''
    slide0 = pres.slides.add_slide(style(layout))
    title0 = slide0.shapes.title
    title0.text = title
    content0 = slide0.placeholders[1]
    content0.text = content[0]
    if layout == 3:
        content1 = slide0.placeholders[2]
        content1.text = content[1]


def presentation():
    ''' here you put your slides '''
    add_slide(
        layout=0,
        title="My title",
        content=["My subtitle"])

    add_slide(
        layout=1,
        title="First page",
        content=["Subtitle first page"])

    # the layoyt 3 has 2 placeholders
    add_slide(
        layout=3,
        title="Second page",
        content=["left", "right"])


def start_presentation():
    presentation()
    title = "text.pptx"
    try:
        pres.save(title)
    except PermissionError:
        os.system("TASKKILL /F /IM powerpnt.exe")
        pres.save(title)
        print("The previously opened powerpoint file was closed")
    os.system("start " + title)


start_presentation()

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