3.6 KiB

Raw Blame History

Python lang Plugin for Elasticsearch

The Python (jython) language plugin allows to have python as the language of scripts to execute.

In order to install the plugin, simply run: bin/plugin -install elasticsearch/elasticsearch-lang-python/2.0.0.RC1.

For 1.0.x elasticsearch versions, look at master branch.
For 0.90.x elasticsearch versions, look at 1.x branch.

Python Lang Plugin	elasticsearch	jython	Release date
2.0.0-SNAPSHOT	1.0.0.RC1 -> master	2.5.3	XXXX-XX-XX
2.0.0.RC1	1.0.0.RC1 -> master	2.5.3	2014-01-15

Using python with function_score

Let's say you want to use function_score API using python. Here is a way of doing it:

curl -XDELETE "http://localhost:9200/test"

curl -XPUT "http://localhost:9200/test/doc/1" -d '{
  "num": 1.0
}'

curl -XPUT "http://localhost:9200/test/doc/2?refresh" -d '{
  "num": 2.0
}'

curl -XGET "http://localhost:9200/test/_search?pretty" -d'
{
  "query": {
    "function_score": {
      "script_score": {
        "script": "doc[\"num\"].value * _score",
        "lang": "python"
      }
    }
  }
}'

gives

{
   // ...
   "hits": {
      "total": 2,
      "max_score": 2,
      "hits": [
         {
            // ...
            "_score": 2
         },
         {
            // ...
            "_score": 1
         }
      ]
   }
}

Using python with script_fields

curl -XDELETE "http://localhost:9200/test"

curl -XPUT "http://localhost:9200/test/doc/1?refresh" -d'
{
  "obj1": {
   "test": "something"
  },
  "obj2": {
    "arr2": [ "arr_value1", "arr_value2" ]
  }
}'

curl -XGET "http://localhost:9200/test/_search" -d'
{
  "script_fields": {
    "s_obj1": {
      "script": "_source[\"obj1\"]", "lang": "python"
    },
    "s_obj1_test": {
      "script": "_source[\"obj1\"][\"test\"]", "lang": "python"
    },
    "s_obj2": {
      "script": "_source[\"obj2\"]", "lang": "python"
    },
    "s_obj2_arr2": {
      "script": "_source[\"obj2\"][\"arr2\"]", "lang": "python"
    }
  }
}'