python将url转变成二维码图片

将url数据转变成二维码数据，再将二维码图片转成base64格式返回

import qrcode
import io
def url_image(self,url):

        img = qrcode.make(url)
        img = img.get_image()
        in_mem_file = io.BytesIO()
        img.save(in_mem_file, format="PNG")
        in_mem_file.seek(0)
        img_bytes = in_mem_file.read()
        base64_encoded_result_bytes = base64.b64encode(img_bytes)
        base64_encoded_result_str = base64_encoded_result_bytes.decode('ascii')
        return base64_encoded_result_str