how to know url after upload in s3 using boto3 code example

Example: how to know url after upload in s3 using boto3

bucket_location = boto3.client('s3').get_bucket_location(Bucket=s3_bucket_name)
object_url = "https://s3-{0}.amazonaws.com/{1}/{2}".format(
    bucket_location['LocationConstraint'],
    s3_bucket_name,
    key_name)