"""Exception for missing s3 files."""


class S3FileNotFound(Exception):
    """
    Exceptions that raises if provided key wasn't found in bucket.

    Attributes:
       key (str): Wrong provided key.
       bucket (str): S3 Bucket.
    """

    def __init__(self, key, bucket):
        """Show exception message.

        Args:
            key (str): Key that wasn't found in provided bucket.
            bucket (str): Bucket where key had to exist.
        """
        Exception.__init__(self, '{key} not found in bucket {bucket}!'.format(
            key=key, bucket=bucket))