如何使用Python和pdf417同时创建多个条形码

import pylibdmtx
from reportlab.lib.pagesizes import A4
from reportlab.pdfgen import canvas

def create_barcodes(data_list, output_file):
    pdf = canvas.Canvas(output_file, pagesize=A4)
    
    x, y = 50, 750  # 初始位置
    barcode_width, barcode_height = 100, 50  # 条形码尺寸
    
    for data in data_list:
        barcode = pylibdmtx.encode(data)
        pdf.drawImage(barcode.asPIL(), x, y, width=barcode_width, height=barcode_height)
        
        pdf.drawString(x + 20, y - 20, data)  # 在条形码下方显示数据
        
        if x + 2 * barcode_width + 20 > A4[0]:
            x = 50
            y -= 2 * barcode_height + 40
        else:
            x += barcode_width + 20
            
        if y <= 50:
            pdf.showPage()
            x, y = 50, 750
            
    pdf.save()

data_list = ['ABC123', 'DEF456', 'GHI789']  # 要生成的条形码数据列表
output_file = 'barcodes.pdf'  # 输出文件名

create_barcodes(data_list, output_file)