如何在fpdf中将字体样式设置为row函数

from fpdf import FPDF

class MyPDF(FPDF):
    def __init__(self):
        super().__init__()
        self.set_font('Arial', 'B', 16)  # 设置字体为Arial，粗体，大小为16

    def header(self):
        # 设置页眉内容
        self.cell(0, 10, 'Header', 0, 1, 'C')

    def footer(self):
        # 设置页脚内容
        self.set_y(-15)
        self.cell(0, 10, 'Page %s' % self.page_no(), 0, 0, 'C')

    def chapter_title(self, title):
        # 设置章节标题样式
        self.set_font('Arial', 'B', 12)
        self.cell(0, 10, title, 0, 1, 'L')

    def chapter_body(self, content):
        # 设置章节正文样式
        self.set_font('Arial', '', 10)
        self.multi_cell(0, 10, content)

    def add_chapter(self, title, content):
        # 添加章节
        self.chapter_title(title)
        self.chapter_body(content)

pdf = MyPDF()
pdf.add_page()
pdf.add_chapter('Chapter 1', 'This is the content of chapter 1.')
pdf.add_chapter('Chapter 2', 'This is the content of chapter 2.')
pdf.output('output.pdf')