cached_property

Transform a method of a class into a property whose value is computed once and then cached as a normal attribute for the life of the instance. Similar to property(), with the addition of caching. Useful for expensive computed properties of instances that are otherwise effectively immutable.

Syntax

PYTHON Copy

@functools.cached_property(func)

Examples

Example 1

PYTHON Copy

class DataSet:

    def __init__(self, sequence_of_numbers):
        self._data = tuple(sequence_of_numbers)

    @cached_property
    def stdev(self):
        return statistics.stdev(self._data)

See Also

property() cached_property() property() cached_property() property() lru_cache() How do I cache method calls? cached_property()