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Show exception as step in scenario run log

Level 3
Show exception as step in scenario run log

I have a scenario with a custom python step running the below code.  Essentially I'm checking if the tables are accessible (not locked for loading) and I check if the source data is newer than the destination table.  

Checking the tables for access is done using the scenario function execute_sql.  This is convenient because it prints a step to the scenario run log.  Is there a way I can print a python step to the scenario log just the like execute_sql()?  



from dataiku.scenario import Scenario
import time
import datetime
from datetime import timedelta
from dataiku.core.sql import SQLExecutor2
from dateutil.relativedelta import relativedelta

TD_executor = SQLExecutor2(connection="TD")
SSO_executor = SQLExecutor2(connection="SSO")

today =

counter = 0
max_tries = 35
sec = 60
wait_time = 10

state_list = ['QQ']
view_list = ['xxx', 'yyy', 'zzz']

scenario = Scenario()

def check_views_access(conn_name, state, view):
    scenario.execute_sql(conn_name, "select max(dt) from {state}.{view}".format(state=state, view=view))

def check_eeee(conn_name):
    scenario.execute_sql(conn_name,"select top 1 XX from [ddd].[TBL1]")
    scenario.execute_sql(conn_name,"select top 1 XX from [ddd].[TBL2]")

def compare_sss_dt_to_iii_dt(TD_exec, SSO_exec):

    sss_pd_dt = TD_exec.query_to_df("select max(dt) as dt from view.tbl").iloc[0,0]
    sss_pd_dt = datetime.datetime.strptime(sss_pd_dt, "%Y-%m-%dT%H:%M:%S.%fZ")

    iii_pd_dt = SSO_exec.query_to_df("select max(dt) as dt from db.schema.tbl").iloc[0,0]
    iii_pd_dt = datetime.datetime.strptime(iii_pd_dt, "%Y-%m-%dT%H:%M:%S.%fZ")

    if sss_pd_dt == iii_pd_dt:
        raise Exception("sss and iii are same")
    elif sss_pd_dt > iii_pd_dt:
    elif sss_pd_dt < iii_pd_dt:
        raise Exception("sss is lower than iii")

while counter < max_tries:
        for state in state_list:
            for view in view_list:       
                check_views_access(conn_name = 'TD',
                                    state = state,
                                    view = view)

        check_eeee(conn_name = 'TTT')
        compare_sss_dt_to_iii_dt(TD_exec=TD_executor, SSO_exec=SSO_executor)
        time.sleep(sec * wait_time)
        counter += 1

        if counter >= max_tries:
            raise Exception("failed to run")



I want to be able to see in the scenario log that my function (compare_sss_dt_to_iii_dt) raised an exception.



Screen Shot 2021-07-28 at 2.00.17 PM.png




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2 Replies
Level 3

One solution I came up with is to create another scenario in the project and put just one function in there.  Then I have my main scenario use scenario.run_scenario("other_scenario") in a custom python step to call that auxiliary scenario so that it shows the outcome of that function as a single step within my main scenario.

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Community Manager
Community Manager

Thank you for sharing your solution @sylvyr3

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