ODoo python生成QRコードによるデータベースへの保存

# -*- coding: utf-8 -*-
import qrcode

# odoo create  
@api.model
def create(self, vals):
    result = super(odoo, self).create(vals)
    #      
    img_file = create_qrcode(result.code)
    result.qrcode_file = base64.encodestring(img_file)

    return result

# code          
def create_qrcode(code):
    #      
    qr = qrcode.QRCode(
        version=1,
        error_correction=qrcode.constants.ERROR_CORRECT_L,
        box_size=10,
        border=4,
    )
    qr.add_data(code)
    qr.make(fit=True)
    img = qr.make_image()
    #       
    img.save('D:\\test.png')
    img_file = open('D:\\test.png', 'rb').read()
    return img_file