tdnb.exit() - Teradata VantageCloud Lake

Use the tdnb.exit() function to exit a notebook with a message.

As touch based in the previous section, tdnb.exit() is a utility which has power to stop the execution of notebook when run from another notebook and has ability to send a message to its caller notebook. So, caller notebook effectively makes use of the message and take decisions appropriately.

Required Parameters

message: Specifies the message to be returned from the executed notebook to the executor notebook.

Example 1

Consider the same example used for tdnb.run_notebook(). However, in this example, check whether logger is executed or not from notebook1.ipynb1 using tdnb.exit().

content of logger_notebook.ipynb

import logging
logger = logging.getLogger('LoggerNotebook')

logging.getLogger().setLevel(logging.INFO)

from teradatamlwidgets import tdnb
tdnb.text('log message', 'message', 'LogMessage:'

logger.warning(tdnb.get('log_message'))

tdnb.exit("logged")

tdnb utility - tdnb.exit() function example logger_notebook output

content of notebook1.ipynb

from teradatamlwidgets import tdnb

tdnb.run_notebook('logger_notbook.ipynb', arguments={'log_message': 'Message1'})

tdnb utility - tdnb.exit() function example notebook1 output

Example 2

Design two notebooks:

Design a notebook with name test_even_odd.ipynb to look for a number, decide whether it is even or odd and exist with message as EVEN or ODD.
Design another notebook notebook1.ipynb to pass a number to test_even_odd.ipynb and retrieve message from it.

Content of test_even_odd.iypnb

from teradatamlwidgets import tdnb
tdnb.text('number', '0', 'Number'

# Retrieve the value. Parse the value to int 
# text field always stores in string format
num = int(tdnb.get('number'))

if num%2 == 0
   tdnb.exit('EVEN')
else:
   tdnb.exit('ODD')

tdnb utility - tdnb.exit() function example test_even_odd output

Content of notebook1.iypnb

from teradatamlwidgets import tdnb

tdnb.runbook('test_even_odd.ipynb', arguments={'number': '5'})

tdnb.runbook('test_even_odd.ipynb', arguments={'number': '4'})