Python Script Node: 'NameError: name knime is not defined

[afarrokh]

Hi all,

I am new to KNIME and have installed the latest version 5.8. I am trying to set up a neural network using the Python Script node to define the network structure via Python. To test I am using the default script:

import knime.scripting.io as knio

# Minimal test

df = knime.in_table

knime.out_table = df

knio.flow_variables[“knime.workspace”]

However, when I execute the node, I get the following error:

NameError: name 'knime' is not defined

Here is my current setup:

• OS: Windows 11

• Anaconda installed and configured

• KNIME Preferences: File → Preferences → Python → Conda → Python 3 Conda environment knime-pytorch, Python 3.8.20

• Extensions installed: KNIME Python Scripting Extension 5.5.0.v202507010920

I would appreciate any guidance on why the knime module is not recognized in the Python Script node and how to properly configure it to define my neural network.

Thank you!

[Fabien_Couprie]

When I read the example into the python script node , the input table is named knio.input_tables[0] as the output is named knio.output_tables[0] ?

[afarrokh]

Hi Fabien,

Thank you very much for your reply . I have a Table Partitioner node feeding into this Python Script node. I have the code for training the neural network. However, I am still encountering the same error.

At this stage, I’m trying to test a basic setup to ensure everything works correctly before replacing it with my full code. Kindly see the details below:

[steffen_KNIME]

@afarrokh As @Fabien_Couprie implied, your naming is incorrect. I also don’t understand how you come up with lines 3 and 4. Please use a fresh node and examine the example and descriptions. It should look like Fabien wrote.

[ActionAndi]

Hi,

your Python code is not correct. You try to reference to an object knime which does not exist.

The code look something like this.

import knime.scripting.io as knio
df = knio.input_tables[0].to_pandas()
knio.output_tables[0] = knio.Tables.from_pandas(df)

If you are not sure how to program the Python Node I can highly recommend to use K-AI. Just click the button and tell it what you want to achieve

[afarrokh]

Hi Steffen,
It worked — really appreciate your help and support from you and Fabein!

[afarrokh]

Thank you for your suggestion ActionAndi! it defently helped.