how to pass a credntials variable to a python script

[mgirdwood]

Hi - I am trying continue my journey in using our local company LLM. I can now connect using a Python script but I am struggling use the Credentials node to pass the API key to the script rather than hard coding

I think the following snippet is the call for the flow variable.

try:
api_key = knime_io.flow_variables[‘credentials’]
except KeyError:
raise ValueError(“API Key not found. Please connect a ‘Credentials Configuration’ node with a flow variable named ‘credentials’.”)

screenshots of the Credentails node and the relevant area of the Python script.

When looking at the python script config the Flow Variables input shows that the credentials is “not supported” ?

I am sure I am missing something obvious in the variable connection

[MartinDDDD]

Hey there,

I think you stated the answer already - in Python Script nodes you cannot use data type credentials - someone from the KNIME team confirmed it in a different context here:

Access the credentials and hostname in python script node

Hi @SnigdhaBiswas, This is not possible for security reasons. If an attacker had access to your workflow, they could simply add a Python Snippet node and print the credentials if they were accessible in there. You may notice that no node shows the credentials in plain text, and if you look at the settings.xml of your nodes, you can see that the credentials are encrypted. Making credentials accessible in Python would compromise these security measures, which is why this is not possible. Kind re…

[mgirdwood]

@MartinDDDD
Thanks for the link, The python script at least proved that our local company LLM is accessible from Knime as it contained the specifc proxy details.

BUT without being able to somehow inject the proxies into the AI LLM Nodes people wont even look at Knime as a modern application. Any application without AI these days is almost redundant to most users looking in from the outside. Its going to be the same with the AI Agentics and KAI unfortunately.

Cheers though for the extra info