This is a pre-production deployment of Warehouse, however changes made here WILL affect the production instance of PyPI.
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Project Description

Cached version of property

Written and used by the folks at Yola to support our free website builder.

Overview

  • cached_property - stores results of decorated methods in decorated object (in _cached_properties attribute)
  • class_cached_property - stores results of decorated methods in the class of decorated object (in _class_cached_properties attribute). All instances will share cached value.
  • clear_property_cache - deletes cached value (works for object cached properties only)
  • set_property_cache - explicitly sets property cache (works for object cached properties only)
  • is_property_cached - allows to check whether property was cached or not (works for object cached properties only)

Usage

from property_caching import (cached_property,
                              class_cached_property,
                              clear_property_cache,
                              set_property_cache,
                              truthy_cached_property)

class Dummy:
    @cached_property
    def foo(self):
        return self.service.expensive_operation()

    @truthy_cached_property
    def bar(self):
        # this value will only be cached if it doesn't evaluate to false:
        return self.service.expensive_operation2()

    @class_cached_property
    def service(self):
        return expensive_service_initialization()

d = Dummy()
d.foo   # calculates result and stores it in d._cached_properties
d.foo   # uses cached value

clear_property_cache(d, 'foo')   # clears cache for property `foo`
set_property_cache(d, 'foo', 42) # explicitly set cache for property `foo`

d2 = Dummy()
d2.foo  # re-calculates value of `foo` but uses cached service

Testing

Install development requirements:

pip install -r requirements.txt

Run the tests with:

python setup.py test
Release History

Release History

1.1.0

This version

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1.0.3

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1.0.2

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1.0.0

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Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
property-caching-1.1.0.tar.gz (3.9 kB) Copy SHA256 Checksum SHA256 Source Mar 29, 2016

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