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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
requests_cache.backends.sqlite
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
``sqlite3`` cache backend
"""
from .base import BaseCache
from .storage.dbdict import DbDict, DbPickleDict
class DbCache(BaseCache):
""" sqlite cache backend.
Reading is fast, saving is a bit slower. It can store big amount of data
with low memory usage.
"""
def __init__(self, location='cache',
fast_save=False, extension='.sqlite', **options):
"""
:param location: database filename prefix (default: ``'cache'``)
:param fast_save: Speedup cache saving up to 50 times but with possibility of data loss.
See :ref:`backends.DbDict <backends_dbdict>` for more info
:param extension: extension for filename (default: ``'.sqlite'``)
"""
super(DbCache, self).__init__()
self.responses = DbPickleDict(location + extension, 'responses', fast_save=fast_save)
self.keys_map = DbDict(location + extension, 'urls')
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