airflow/hooks/S3_hook.py
def check_for_wildcard_key(self,
                               wildcard_key, bucket_name=None, delimiter=''):
        """
        Checks that a key matching a wildcard expression exists in a bucket

        :param wildcard_key: the path to the key
        :type wildcard_key: str
        :param bucket_name: the name of the bucket
        :type bucket_name: str
        :param delimiter: the delimiter marks key hierarchy
        :type delimiter: str
        """
        return self.get_wildcard_key(wildcard_key=wildcard_key,
                                     bucket_name=bucket_name,
                                     delimiter=delimiter) is not None
def check_for_wildcard_key(self,
                               wildcard_key, bucket_name=None, delimiter=''):
        """
        Checks that a key matching a wildcard expression exists in a bucket

        :param wildcard_key: the path to the key
        :type wildcard_key: str
        :param bucket_name: the name of the bucket
        :type bucket_name: str
        :param delimiter: the delimiter marks key hierarchy
        :type delimiter: str
        """
        return self.get_wildcard_key(wildcard_key=wildcard_key,
                                     bucket_name=bucket_name,
                                     delimiter=delimiter) is not None
Checks that a key matching a wildcard expression exists in a bucket

        :param wildcard_key: the path to the key
        :type wildcard_key: str
        :param bucket_name: the name of the bucket
        :type bucket_name: str
        :param delimiter: the delimiter marks key hierarchy
        :type delimiter: str