python docx WD_LINE_space.SINGLE不工作

非常简单的代码：

from docx.enum.text import WD_LINE_SPACING
from docx import Document

document = Document('demo.docx')
smi_line = document.add_paragraph('test line spacing')
smi_line.line_spacing_rule = WD_LINE_SPACING.SINGLE
document.save('demo.docx')

---

当我在MS Word中打开demo.docx时，我看到行距是倍数。我做错了什么？

我想你要找的是

段落格式

对象上的

行间距规则

属性：

from docx.enum.text import WD_LINE_SPACING
from docx import Document

document = Document()
paragraph = document.add_paragraph('test line spacing')
paragraph.paragraph_format.line_spacing_rule = WD_LINE_SPACING.SINGLE
document.save('demo.docx')