如何使用utf-8将txt转换为pdf？

from reportlab.pdfgen import canvas

def txt_to_pdf(txt_file, pdf_file):
    # 读取txt文件内容
    with open(txt_file, 'r', encoding='utf-8') as file:
        txt_content = file.readlines()

    # 创建PDF文件
    c = canvas.Canvas(pdf_file)

    # 设置PDF样式
    c.setPageSize((595.27, 841.89))  # A4纸大小
    c.setFont("Helvetica", 12)

    # 将txt内容写入PDF
    y = 800  # 设置初始纵坐标
    for line in txt_content:
        c.drawString(50, y, line.strip())
        y -= 20  # 每行间隔20个单位

    # 保存PDF文件
    c.save()

# 调用函数进行转换
txt_to_pdf('input.txt', 'output.pdf')