python-pptx:将图片插入占位符但出现错误

Question

我想使用 insert_picture() 将我创建的绘图插入到幻灯片中。
我从网上搜索，找到信息here 。

我创建了一个简单的图形，如下所示:

fig, ax = plt.subplots(2,1, sharex=True, sharey=True)

我使用 python-pptx 创建一个幻灯片。

graph_slide_layout = prs.slide_layouts[0]
slide = prs.slides.add_slide(graph_slide_layout)
title = slide.shapes.title
title.text = "Test"
placeholder = slide.placeholders[1]
pic = placeholder.insert_picture(fig)
prs.save('Desktop\test.pptx')

但是，我收到一个错误:

AttributeError: 'SlidePlaceholder' object has no attribute 'insert_picture'

我发现了一张纸条 here 。

Note
A reference to a picture placeholder becomes invalid after its insert_picture() method is called. 
This is because the process of inserting a picture replaces the original p:sp XML element with a new p:pic element containing the picture. 
Any attempt to use the original placeholder reference after the call will raise AttributeError. 
The new placeholder is the return value of the insert_picture() call and may also be obtained from the placeholders collection using the same idx key.

之后，我将代码更改为:

graph_slide_layout = prs.slide_layouts[8]
slide = prs.slides.add_slide(graph_slide_layout)
title = slide.shapes.title
title.text = "Test"
placeholder = slide.placeholders[1]
pic = placeholder.insert_picture(fig)
prs.save('Desktop\test.pptx')

placeholder.name
'Picture Placeholder 2'
placeholder.placeholder_format.type
18

我收到另一个错误:

AttributeError: 'Figure' object has no attribute 'seek'

有什么想法吗？

Answer 1

我解决了。
您应该首先保存图形并使用保存图。

fig.save('test')

pic = placeholder.insert_picture('test.png')