Python Library numpy and pandas missing (Knime 3.7 Python 3)

KNIME Extensions Scripting
#1

Hi,
I have a problem in my python connection which originally works on the previous knime version.
I have pointed it out to the right environment.
The packages on my conda list contain numpy and pandas. All is working well in jupyter.

Please help.
I would like the env to remain like that because I am using it also for a different purpose.

Thank You

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#2

Hi @Claudette_Paneza,

for the KNIME Python integration we recommend to use python=3.6. In general, you can find a list of the recommended package version for the KNIME Python Integration here.

I saw that you are pointing directly to the python.exe in your conda environment. As this works for python=3.6, since python=3.7 you need to use a start script for the Python Integration to be able to correctly recognize the installed packages. You can find a description on how to set up such a start script here.

Let me know if you have more questions.

Cheers,
David

1 Like
#3

Hi David,

Thank you it works. Knime now accepts the path without errors.
But I encountered another error. “IndexErrpr : list index out of range”

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This error did not exist on the earlier knime version.

Thank You again

#4

Since this is happening within python I doubt that it has to do with the version of KNIME.

The error means you are trying to access a list item that is not there.

Maybe check/print the number of items in the “line” item that starts the loop if it matches the actual number of lines. Or if you may have an empty file.

1 Like
#5

Is there any option for using Python without installing conda? I currently have a Python 3.8 installation that works smoothly for all other uses, but Knime consistently throws the error described above…and I’d really rather not install the gigantic reptile :wink:

"
Library numpy is missing.
Library pandas is missing, required minimum version is 0.20.0 (inclusive).
"

Documentation implies that it is possible, but does not give any guidance! Anyone out there have experience with it?

(Knime 4.2.1, Python 3.8.5)

#6

I’m having the same issue now with KNIME Version 4.3 and Python 3.8.6. It worked fine on KNIME 4.2 version.
I am using manual configuration of Python with KNIME and not conda.

Error while configuring the bat file
"
Library numpy is missing.
Library pandas is missing, required minimum version is 0.20.0 (inclusive).
"

Could you please help resolve this issue?