找了很久python-docx如何实现分栏都找不到，百度搜索的都是分页而不是分栏，python-docx文档生肉看起来又太费劲，结果上外网一搜索就找到了

from docx import Document
from docx.oxml import OxmlElement
from docx.oxml.ns import qn

document = Document()
section = document.sections[0]

sectPr = section._sectPr
cols = sectPr.xpath('./w:cols')[0]
cols.set(qn('w:num'),'2')

document.save('demo.docx')