Color Extraction from Color Manager

[schmidn]

Hi,
I would like to develop a Python View Node with plotly in python.
For Scatterplots there should be a way to choose between a standard color palette which is defined within the developed node and a color palette which is defined in the Color Manager Node.

Is it possible to extract the color information from the table with colors of the Color Manager Node?
I don’t really want to use the Extract Color Node to keep the workflow as simple as possible.

Best regards
Nico

[bwilhelm]

Hi @schmidn,
Welcome to the KNIME Forum! Sadly the color information from the “Color Manager” node is not accessible from Python nodes. The general color management will receive an overhaul in the future (I don’t know any details yet). When this overhaul takes place we will make sure that Python nodes will be able to access color information. I fear, for now, you have to go with the “Extract Color” node.

[mlauber71]

@schmidn

Is it possible to extract the color information from the table with colors of the Color Manager Node?

I once built this solution to use colours from the Color Manager in Python. Maybe not the most elegant way …

Python View and Color Manager

I am not exactly sure how one would store a piece of colour information with a Pandas data frame. I constructed a script that would extract the colour settings from the KNIME colour manager and store them as a Python dictionary object and save that as a pickle file. [image] This dictionary will later be loaded back into the Python script and be used as a palette with seaborn or as a colour dictionary for matplotlib. [image] OK admittedly not the most straightforward solution but hey it can …

Transform KNIME Color Manager to Python Color Dictionary – mlauber71