How can I filter and summarize data in elastic search through python. I manually created a data table visualization through Kibana interface and downloaded it in .csv format. Now I want to do the same using python.
For example, if there are 10 variables in the index: v1,v2,v3,.. v10
then how to get a data table which can be described in sql as:
select v2, count(v2)
from index
where v1 = "some value"
group by v2
Till now I am able to do this:
from elasticsearch5 import Elasticsearch
user = 'xxx'
password = 'xxx'
url = 'xxx'
command = "%s:%s@%s:9200" % (user,password,url)
x = Elasticsearch(command)
# Get the count of documents
num = x.count(index='my_index')['count']
# Get documents filtered by v1
my_docs = x.search(index="my_index", body={"query": {"match": {'v1':'US'}}})
Now what I want is to select only variable v2
from my_docs and also group by v2
to get a count. Apologies that I don't know how to create a reproducible example without revealing the user credentials.
If you want to treat only few fields on your doc, you should use the _source filter
before your query - doc here . For example to retrieve from your docs only the v1
and v2
fields :
body={
"_source": ["v1", "v2"],"query": {"match": {'v1':'US'}}}
You just try something like this:
for result in mydocs['hits']['hits']:
print result["_source"]['v1']
print result["_source"]['v2']
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