elasticsearch-py

Overviewedit

Official low-level client for Elasticsearch. Its goal is to provide common ground for all Elasticsearch-related code in Python; because of this it tries to be opinion-free and very extendable. The full documentation is available at http://elasticsearch-py.rtfd.org/

Elasticsearch DSL

For a more high level client library with more limited scope, have a look at elasticsearch-dsl - a more pythonic library sitting on top of elasticsearch-py.

It provides a more convenient and idiomatic way to write and manipulate queries. It stays close to the Elasticsearch JSON DSL, mirroring its terminology and structure while exposing the whole range of the DSL from Python either directly using defined classes or a queryset-like expressions.

It also provides an optional persistence layer for working with documents as Python objects in an ORM-like fashion: defining mappings, retrieving and saving documents, wrapping the document data in user-defined classes.

Installationedit

It can be installed with pip:

pip install elasticsearch

Versioningedit

There are two branches for development - master and 1.x. Master branch is used to track all the changes for Elasticsearch 2.0 and beyond whereas 1.x tracks Elasticsearch 1.*.

Releases with major version 1 (1.X.Y) are to be used with Elasticsearch 1.* and later, 0.4 releases are meant to work with Elasticsearch 0.90.*.

The recommended way to set your requirements in your setup.py or requirements.txt is:

    # Elasticsearch 2.x
    elasticsearch>=2.0.0,<3.0.0

    # Elasticsearch 1.x
    elasticsearch>=1.0.0,<2.0.0

Example useedit

Simple use-case:

>>> from datetime import datetime
>>> from elasticsearch import Elasticsearch

# by default we connect to localhost:9200
>>> es = Elasticsearch()

# datetimes will be serialized
>>> es.index(index="my-index", doc_type="test-type", id=42, body={"any": "data", "timestamp": datetime.now()})
{u'_id': u'42', u'_index': u'my-index', u'_type': u'test-type', u'_version': 1, u'ok': True}

# but not deserialized
>>> es.get(index="my-index", doc_type="test-type", id=42)['_source']
{u'any': u'data', u'timestamp': u'2013-05-12T19:45:31.804229'}

All the API calls map the raw REST api as closely as possible, including the distinction between required and optional arguments to the calls. This means that the code makes distinction between positional and keyword arguments; we, however, recommend that people use keyword arguments for all calls for consistency and safety.

Featuresedit

The client’s features include:

translating basic Python data types to and from json (datetimes are not decoded for performance reasons)
configurable automatic discovery of cluster nodes
persistent connections
load balancing (with pluggable selection strategy) across all available nodes
failed connection penalization (time based - failed connections won’t be retried until a timeout is reached)
thread safety
pluggable architecture

The client also contains a convenient set of helpers for some of the more engaging tasks like bulk indexing and reindexing.

Licenseedit

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.