gistfile1.txt

def _check_meter_image(self, meter_image):  # meter_image is a base64-encoded string
        err_msg = 'Please take a photograph of the meter'
        if meter_image:
            pre_img     = base64.encodestring(bytearray(meter_image, 'utf8'))
            pre_img2    = base64.decodestring(pre_img)
            img_file    = io.BytesIO(pre_img2)
            img         = Image.open(img_file)
            print(img.filename)
            if img.format == 'JPEG':
                return True
            else:
                self._log_error(self.errors, err_msg)
        else:
            self._log_error(self.errors, err_msg)