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Dictionary with auto-expiring values for caching purposes, support default value

Project description

Expiring Dict

expiringdict is a Python caching library. The core of the library is ExpiringDict class which is an ordered dictionary with auto-expiring values for caching purposes. Expiration happens on any access, object is locked during cleanup from expired values. ExpiringDict can not store more than max_len elements - the oldest will be deleted.

Note: Iteration over dict and also keys() do not remove expired values!

Features after fork

  • optioinal default value passed by dict after keys expired


If you wish to install from PyPi:

pip install expiringdict-with-default

If you wish to download the source and install from GitHub:

git clone
python install

To run tests with coverage:

nosetests --with-coverage --cover-package=expiringdict


Create a dictionary with capacity for 100 elements and elements expiring in 10 seconds:

from expiringdict import ExpiringDict
cache = ExpiringDict(max_len=100, max_age_seconds=10, default={'name': 'Alice'})

put and get a value there:

cache["key"] = "value"

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