error when create a simple conditional statement in Python node

[mlauber71]

Well strictly speaking this is not a KNIME question but since we are at it (doing some more Python lately).

Here is a variant with a quick lambda function

import numpy as np
from pandas import DataFrame
mydata = input_table.copy()

# https://datatofish.com/if-condition-in-pandas-dataframe/

mydata['column'] = mydata['ClientNo'].apply(lambda x: 'hello world' if x =='T'  else 'no T')

output_table = mydata

Two more variants including a third condition is in the KNIME workflow:

As an additional service since you might want to do more with KNIME and Python here is a basic example of the three main Python inputs and outputs between KNIME and Python, data (you already used that), graphics and prediction models (strictly speaking this pickle thing could also be done by simple Python node but it looks more KNIMEy that way )

Running Python Script Gives Error

Question is what kind of output you would expect. KNIME and Python would typically have three generic outputs data manipulations etc using Python build prediction models and save them use graphic packages like seaborn and export graphics (as PNG) I modified an earlier example to show all three (if you just save results from Python you might use much more), and also there is the ability to integrate Jupyter notebooks in KNIME. [image] kn_example_python_logistic_regression_iris_graphic.knwf …

kn_example_python_if_then.knwf (22.2 KB)