cached_property() - computed once per instance, cached as attribute
Project description
What
Python 3.8 adds great descriptor to functools: cached_property. Technically all required APIs was available since python 3.6, but it is what it is.
This package is a backport of this functionality for python 3.6 and 3.7.
How to use
from backports.cached_property import cached_property
And then python 3.8 documentation will work (because code is minimally changed):
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.
Example:
class DataSet: def __init__(self, sequence_of_numbers): self._data = sequence_of_numbers @cached_property def stdev(self): return statistics.stdev(self._data) @cached_property def variance(self): return statistics.variance(self._data)
Project details
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
Built Distribution
File details
Details for the file backports.cached-property-1.0.2.tar.gz
.
File metadata
- Download URL: backports.cached-property-1.0.2.tar.gz
- Upload date:
- Size: 8.0 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/4.0.1 CPython/3.10.4
File hashes
Algorithm | Hash digest | |
---|---|---|
SHA256 | 9306f9eed6ec55fd156ace6bc1094e2c86fae5fb2bf07b6a9c00745c656e75dd |
|
MD5 | 2de0257c18e50a8d189e93e8860aa674 |
|
BLAKE2b-256 | 08834cea5c665d2af765c02f7d8e8560b5918405c1d7d11ccfc60c4919c1cfd0 |
File details
Details for the file backports.cached_property-1.0.2-py3-none-any.whl
.
File metadata
- Download URL: backports.cached_property-1.0.2-py3-none-any.whl
- Upload date:
- Size: 6.1 kB
- Tags: Python 3
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/4.0.1 CPython/3.10.4
File hashes
Algorithm | Hash digest | |
---|---|---|
SHA256 | baeb28e1cd619a3c9ab8941431fe34e8490861fb998c6c4590693d50171db0cc |
|
MD5 | 9b0a43c00e5bee52ddfc5d0677359d83 |
|
BLAKE2b-256 | ebae69e52acdcf381b108b36d989ea58656de4a9ab8863aba6176d80d01041df |