Python snippet for calling a REST service on the KNIME Server

call_KNIME_WebService.py

# Define some generic functionality for accessing web services from the KNIME server
import requests,json
from requests import auth
def call_KNIME_WebService(serviceName,values,user,pw,baseURL="http://YOUR_SERVER_NAME_HERE:8080/webportal/rest/v4/repository/"):
    url = "%s%s:job-pool"%(baseURL,serviceName)
    authd = auth.HTTPBasicAuth(user,pw)
    reqbody = json.dumps({"input-data":{"jsonvalue":qry}})
    resp = requests.post(url,auth=authd,data=reqbody,headers={"Content-Type":"application/json"})
    if resp.ok and resp.status_code==200:
        outvs = resp.json()['outputValues']
        return tuple(outvs.values())
    raise RuntimeError(resp.status_code)