The cinder.volume.drivers.datacore.utils Module¶

Utilities and helper functions.

build_network_address(host, port)¶

Combines the specified host name or IP address with the specified port.

Parameters:	host – Host name or IP address in presentation (string) format port – Port number
Returns:	The host name or IP address and port combination; IPv6 addresses are enclosed in the square brackets

get_distinct_by(key, source)¶

Finds distinct items for the key and returns the result in a list.

Parameters:	key – Function computing a key value for each item source – Iterable collection of items
Returns:	The list of distinct by the key value items

get_first(predicate, source)¶

Searches for an item that matches the conditions.

Parameters:	predicate – Defines the conditions of the item to search for source – Iterable collection of items
Returns:	The first item that matches the conditions defined by the specified predicate, if found; otherwise StopIteration is raised

get_first_or_default(predicate, source, default)¶

Searches for an item that matches the conditions.

Parameters:	predicate – Defines the conditions of the item to search for source – Iterable collection of items default – Value that is returned if the iterator is exhausted
Returns:	The first item that matches the conditions defined by the specified predicate, if found; otherwise the default value