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memoized-property

library1.0.3pypypi✓ verified 83d ago

A lightweight Python decorator for creating cached properties that compute their value only once per instance. Version 1.0.3, last updated in 2015. No active maintenance.

development

pip install memoized-property

github ↗homepage ↗

INSTALL

IMPORT

SIG · MEMOIZED-PROPERTY

memoized-property

developmentpythonv1.0.3

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

memoized_property

✓ from memoized_property import memoized_property

✗ from memoized import memoized_property

'memoized' is not the package name.

Basic usage of @memoized_property to cache a property.

from memoized_property import memoized_property class MyClass: @memoized_property def expensive(self): return [i for i in range(10000)] obj = MyClass() print(obj.expensive) # computed once print(obj.expensive) # cached

Debug

Known issues

gotchaThis decorator only works on classes (not standalone functions) and requires the property to be defined on an instance.

fix

Use @property combined with functools.lru_cache for more flexibility.

affects: <1.0.4

deprecatedLibrary is no longer maintained (last release 2015). Consider using @functools.cached_property (Python 3.8+) or @property + lru_cache.

fix

Replace import and decorator with cached_property from functools.

affects: >=1.0.0

Errors

Common errors & fixes

ImportError: No module named memoized_property

Package not installed or wrong Python environment.

fix

Run 'pip install memoized-property'.

AttributeError: 'function' object has no attribute '__memoized_property__'

Applied decorator to a method that is not a property (classmethod or staticmethod).

fix

Ensure decorator is used on a method that returns a value (like a property).

Upgrade

Version history

1.0.3latest on PyPI · released Sep 29, 2016

Audit

Dependencies

No dependency data recorded yet.

Agent activity

49 hits · last 30 days

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Resources

githubhttps://github.com/estebistec/python-memoized-property ↗

homepagehttps://github.com/estebistec/python-memoized-property ↗