How to execute python in knime

[astreiff]

See this post for suggested work around:

Python node failing - No serializer extension having the id or processing python type "int"

I guess (hope!), we finally found the problem. It seems like we do not support the full range of available numpy.dtypes, yet, but mostly the ones that exactly match the data types available in KNIME (e.g. numpy’s int32 matches KNIME’s Number (Integer), int64 matches Number (Long), etc.). Other, less common data types such as uint16 do not get recognized as “KNIME-native”. That’s why KNIME looks for serializer extensions that are able to handle the type but doesn’t find one. Somewhere on the way…

Knime does not currently support all numpy.dtypes.