Python script for Qlik Engine JSON API

import requests
import websocket, ssl
import json,  csv
import os, time
from pprint import pprint

#Connecting to the server. The lines below will be replaced by the certificates and headers for enterprise usage later
ws = websocket.WebSocket()
ws.connect("ws://localhost:4848/app/")

#For getting the doc (app) list
doclist_req = {
    "handle": -1,
    "method": "GetDocList",
    "params": [],
    "outKey": -1,
    "id": 1
}

ws.send(json.dumps(doclist_req))
result = ws.recv()
ws.send(json.dumps(doclist_req))
result = ws.recv()
result_json = json.loads(result)
print(result_json)
print()

#For opening the doc (app)
app_req = {
    "jsonrpc": "2.0",
    "method": "OpenDoc",
    "handle": -1,
    "params": [
        #Can iterate if multiple apps are there
        #Since only one app was present we used the index 0
        result_json['result']['qDocList'][0]['qDocId']
    ],
    "outKey": -1,
    "id": 2
}

#The first call seems to be for establishing the connection and second to actually send the request body
ws.send(json.dumps(app_req))
result = ws.recv()
ws.send(json.dumps(app_req))
result = ws.recv()
result_json = json.loads(result)
print(result_json)
print()
app_req_handle = result_json['result']['qReturn']['qHandle']

#For creating the session object necessary for fetching dimensions, fields, etc.
session_req = {
    "jsonrpc": "2.0",
    "method": "CreateSessionObject",
    "handle": app_req_handle,
    "params": [
        {
            "qInfo": {
                "qType": "SheetList"
            },
            "qAppObjectListDef": {
                "qType": "sheet",
                "qData": {
                    "title": "/qMetaDef/title",
                    "description": "/qMetaDef/description",
                    "thumbnail": "/thumbnail",
                    "cells": "/cells",
                    "rank": "/rank",
                    "columns": "/columns",
                    "rows": "/rows"
                }
            }
        }
    ],
    "outKey": -1,
    "id": 3
}

ws.send(json.dumps(session_req))
result = ws.recv()
ws.send(json.dumps(session_req))
result = ws.recv()
result_json = json.loads(result)
print(result_json)
print()
session_req_handle = result_json['result']['qReturn']['qHandle']

#For fetching the layout of the sheets
layout_req = {
    "jsonrpc": "2.0",
    "method": "GetLayout",
    "handle": session_req_handle,
    "params": [],
    "outKey": -1,
    "id": 4
}

ws.send(json.dumps(layout_req))
result = ws.recv()
ws.send(json.dumps(layout_req))
result = ws.recv()
result_json = json.loads(result)
print(result_json)
print()

#Since only one sheet was present we used the index 0
list_of_charts = result_json['result']['qLayout']['qAppObjectList']['qItems'][0]['qData']['cells']
for chart in list_of_charts:
    print(chart['name'])
print()

ws.close()