如何用python pptx创建文本形状？

from pptx import Presentation
from pptx.util import Inches

# 创建一个新的PPT
presentation = Presentation()

# 添加一个幻灯片布局为标题和内容的布局
slide_layout = presentation.slide_layouts[1]
slide = presentation.slides.add_slide(slide_layout)

# 添加一个标题
title = slide.shapes.title
title.text = "Hello, World!"

# 添加一个文本框
left = Inches(1)
top = Inches(2)
width = Inches(6)
height = Inches(2)
textbox = slide.shapes.add_textbox(left, top, width, height)
text_frame = textbox.text_frame

# 在文本框中添加文本
p = text_frame.add_paragraph()
p.text = "这是一个文本框"

# 保存PPT
presentation.save("example.pptx")