This document describes the current stable version of Kombu (4.3). For development docs, go here.
Functional-style Utilities - kombu.utils.functional
¶
Functional Utilities.
-
class
kombu.utils.functional.
LRUCache
(limit=None)[source]¶ LRU Cache implementation using a doubly linked list to track access.
Parameters: limit (int) – The maximum number of keys to keep in the cache. When a new key is inserted and the limit has been exceeded, the Least Recently Used key will be discarded from the cache. -
iteritems
()¶
-
iterkeys
()¶
-
itervalues
()¶
-
-
kombu.utils.functional.
memoize
(maxsize=None, keyfun=None, Cache=<class kombu.utils.functional.LRUCache>)[source]¶ Decorator to cache function return value.
-
class
kombu.utils.functional.
lazy
(fun, *args, **kwargs)[source]¶ Holds lazy evaluation.
Evaluated when called or if the
evaluate()
method is called. The function is re-evaluated on every call.- Overloaded operations that will evaluate the promise:
__str__()
,__repr__()
,__cmp__()
.
-
kombu.utils.functional.
maybe_evaluate
(value)[source]¶ Evaluate value only if value is a
lazy
instance.
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kombu.utils.functional.
is_list
(l, scalars=(<class '_abcoll.Mapping'>, <type 'basestring'>), iters=(<class '_abcoll.Iterable'>, ))[source]¶ Return true if the object is iterable.
Note
Returns false if object is a mapping or string.