Consume file from Knime Workflow Directory

KNIME Analytics Platform
#1

I need to place an excel file in Knime Workflow directory, and consume it using Python node. How do I do that so that It is transported along with Workflow artifacts and other folders to different environments and the path remains dynamic.
Please help!!

#2

  1. Put the file in the workflow directory (if at all, this is mega-fiddly in KNIME GUI, so I just do it in the OS by going to the “workspace” folder)

  2. In KNIME, use the URL knime://knime.workflow/path/workflow.txt to access it (i.e. literal knime://knime.workflow + subpath)

  3. If you need to access it in a script, it probably makes sense to build an absolute file URL to the file upon execution – a while ago, I did this using the following absurdly looking node sequence, which would give me something like file:/Users/me/knime-workspace/workflow/path/workflow.txt or /Users/me/knime-workspace/workflow/path/workflow.txt:

    1. String to URI
    2. URL to File Path
    3. String to URI
    4. URI to String

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Just ensure that these nodes re-run upon each execution, so that the path is always updated to the current system environment (hence the red input to the Table Creator)

HTH,
Philipp

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#3

@sujitnath84 about the transfer of data between KNIME and Python you might want to take a look at these examples to see paths variables in action like @qqilihq suggested.

1 Like
#4

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