有没有大神来帮忙看下问题出在哪里？

报错：'Document' object has no attribute 'add_paragragh'

from docx import Document

class Test(object):
    def __init__(self):
        self.doc = Document()

    def test(self):
        self.doc.add_paragragh('test')

if __name__ == '__main__':
    t = Test()
    t.test()