airflow/contrib/hooks/wasb_hook.py
def check_for_prefix(self, container_name, prefix, **kwargs):
        """
        Check if a prefix exists on Azure Blob storage.

        :param container_name: Name of the container.
        :type container_name: str
        :param prefix: Prefix of the blob.
        :type prefix: str
        :param kwargs: Optional keyword arguments that
            `BlockBlobService.list_blobs()` takes.
        :type kwargs: object
        :return: True if blobs matching the prefix exist, False otherwise.
        :rtype: bool
        """
        matches = self.connection.list_blobs(container_name, prefix,
                                             num_results=1, **kwargs)
        return len(list(matches)) > 0
def check_for_prefix(self, container_name, prefix, **kwargs):
        """
        Check if a prefix exists on Azure Blob storage.

        :param container_name: Name of the container.
        :type container_name: str
        :param prefix: Prefix of the blob.
        :type prefix: str
        :param kwargs: Optional keyword arguments that
            `BlockBlobService.list_blobs()` takes.
        :type kwargs: object
        :return: True if blobs matching the prefix exist, False otherwise.
        :rtype: bool
        """
        matches = self.connection.list_blobs(container_name, prefix,
                                             num_results=1, **kwargs)
        return len(list(matches)) > 0
Check if a prefix exists on Azure Blob storage.

        :param container_name: Name of the container.
        :type container_name: str
        :param prefix: Prefix of the blob.
        :type prefix: str
        :param kwargs: Optional keyword arguments that
            `BlockBlobService.list_blobs()` takes.
        :type kwargs: object
        :return: True if blobs matching the prefix exist, False otherwise.
        :rtype: bool