pydanny/cached-property

Support caching generators

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#100 opened on Jun 2, 2018

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Description

Many times I'll have a function such as

def x():
    result = some_long_function_that_eventually_calculates_a_list()
    yield from (result.name for result in result)
    yield from (result.path for result in result)

I can't cache this function using regular cached_property because the generator will be exhausted. I want to calculate it once, then whenever it is being called again return the items I retrieved in the order I retrieved them.

Contributor guide

Research direction
Investigate how to cache a generator's output by storing yielded values in a list, then returning a fresh iterator over that list on subsequent calls. Consider thread safety and memory implications.
Tech stack
python
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Python
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50