def get_object_info(self):
    """
    查看桶内是否以存在同名对象

    :return:
    """
    try:
        res = self.s3_client.head_object(
            Bucket=DESTINATION_BUCKET,
            Key=MULTIPART_UPLOAD_FILE_NAME
        )
        object_size = res["ContentLength"]
    except botocore.exceptions.ClientError:
        
        object_size = -1
    return object_size