Transform not working in template

Elastic Stack Elasticsearch
4

@warkolm
The code

{
"test": {
    "transform": {
        "lang": "python",
        "script_file": "python_test",
    },
  "properties": {
    "simple" : {
     "type":"string"
    }
}

python/test.py

ctx["_source"]["simple"] = "hello"

@dadoonet
I really hope this does not get dropped, as pointed out in github there are cases were it makes sense to have this feature and to rip it out is rather defeating (at least the code that does this is now highlited and perhaps I can determine the issue). In my particular case I wanted to take long & lat data coming in as two seperate fields and transform it into a single field. To have logstash running for the sole purpose of transforming this field is a waste of CPU

Nz