escpos.py 文件源码

def qr(self, text,size, *args, **kwargs):
        """ Print QR Code for the provided string """
        qr_args = dict(
            version=4,
            box_size=size,
            border=1,
            error_correction=qrcode.ERROR_CORRECT_M
        )

        qr_args.update(kwargs)
        qr_code = qrcode.QRCode(**qr_args)

        qr_code.add_data(text)
        qr_code.make(fit=True)
        qr_img = qr_code.make_image()
        im = qr_img._img.convert("RGB")
        # Convert the RGB image in printable image
        self._convert_image(im)