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توضیحات

Persistent compressed expiring dict in Python, backed up by sqlite3 and json

ویژگی	مقدار
سیستم عامل	-
نام فایل	expiringsqlitedict-6.2.0
نام	expiringsqlitedict
نسخه کتابخانه	6.2.0
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	-
ایمیل نویسنده	"Taylor C. Richberger" <tcr@absolute-performance.com>
آدرس صفحه اصلی	-
آدرس اینترنتی	https://pypi.org/project/expiringsqlitedict/
مجوز	-

expiringsqlitedict -- expiring file-backed ``dict`` =================================================== .. _Downloads: https://pypi.python.org/pypi/expiringsqlitedict .. _License: https://pypi.python.org/pypi/expiringsqlitedict A lightweight wrapper around Python's sqlite3 database with a MutableMapping interface:: from expiringsqlitedict import SqliteDict with SqliteDict('./my_db.sqlite') as mydict: mydict['some_key'] = any_picklable_object print(mydict['some_key']) # prints the new value for key, value in mydict.items(): print((key, value)) print(len(mydict)) # etc... all dict functions work json is used internally by default to serialize the values. Keys are arbitrary strings, values arbitrary json-able objects. This must be used within a context manager, and serialization can be overridden with your own. The database is wrapped with a transaction, and any exception thrown out of the context manager rolls back all changes. This was forked off of `sqlitedict <https://github.com/RaRe-Technologies/sqlitedict>`_ in order to add auto-expiring functionality, and initially was quite similar to it. Version 2.0 split of completely and takes the module into a complete rewrite, mostly to remove unnecessary Python 2 compatibility, simplify the API, completely enforce a context manager for typical cases, add full typing throughout, and use sqlite triggers for expiration cleanup. Version 3 set the default encoding to json, and made many other API refinements. This version also does not vacuum at all automatically. It did in previous versions, but this was kind of a silly behavior to put into the library itself. If you want your database file intermittently vacuumed, you should put such behavior into a crontab or use the ``sqlite3`` module to do it yourself intermittently. Features -------- * Values can be any json-capable objects (this can be customized to be as flexible as you need, through custom serializers) * Support for access from multiple programs or threads, with locking fully managed by sqlite itself. * A very simple codebase that is easy to read, relying on sqlite for as much behavior as possible. * A simple autocommit wrapper (``SimpleSqliteDict``), if you really can't handle a context manager and need something that fully handles like a dict. You can specify a ``isolation_level`` on this to have to commit and roll back yourself. * An on-demand wrapper (``OnDemand``), for situations where you want to open and close the database in as narrow a window as possible. * Support for custom serialization or compression: .. code-block:: python import json with SqliteDict('some.db', serializer=json) as mydict: mydict['some_key'] = some_json_encodable_object print(mydict['some_key']) Installation ------------ The module has no dependencies beyond Python itself. Install or upgrade with:: pip install expiringsqlitedict or from the `source tar.gz <http://pypi.python.org/pypi/expiringsqlitedict>`_:: python setup.py install This module is a single file, so you could also easily import the module in your own tree, if your workflow needs that. Testing ------- You may test this by running ``test.py`` with ``PYTHONPATH`` set to the current working directory. There is a convenience makefile to do this for you when you run: .. code-block:: sh make test Documentation ------------- Standard Python document strings are inside the module:: >>> import expiringsqlitedict >>> help(expiringsqlitedict) Comments, bug reports --------------------- ``expiringsqlitedict`` resides on `github <https://github.com/absperf/expiringsqlitedict>`_. You can file issues or pull requests there. ---- ``expiringsqlitedict`` is open source software released under the `Apache 2.0 license <http://opensource.org/licenses/apache2.0.php>`_. Version <2 Copyright (c) 2011-2018 `Radim Řehůřek <http://radimrehurek.com>`_ and contributors. All versions copyright (c) 2018-2022 Absolute Performance, Inc.

نیازمندی

مقدار	نام
-	orjson

زبان مورد نیاز

مقدار	نام
>= 3.6, < 4	Python

نحوه نصب

نصب پکیج whl expiringsqlitedict-6.2.0:

pip install expiringsqlitedict-6.2.0.whl

نصب پکیج tar.gz expiringsqlitedict-6.2.0:

pip install expiringsqlitedict-6.2.0.tar.gz