Hi everyone, What I want to do: Read data from my hard drive which contains batch data (in numpy .npz format) and output a numpy array which I want to input into a neural network executor node. The network is a very sophisticated named entity recognition deep learning model, composed of a BILSTM and a CNN (the model works perfectly fine in plane python and produces state of the art results). What I did: I used the Python Source node with the following code (code chunk I): import pandas as pd import numpy as np path = ‘…/test_batches_casefeat_punct_unk.npz’ test_batches = np.load(path, encoding=‘latin1’)[‘arr_0’] #output_table = test_batches #print(output_table[0]) output_table = pd.DataFrame(data = test_batches) print(output_table.iloc) My Problem(s) with this: Like described, I need a numpy array as output, not pandas data frame Second: If I read the output_table from the above code with a Python Script (1 => 1) node and investigate my four colums, I only see booleans (but there should be integers), e.g. (code chunk 2): a = input_table[‘0’] print(a) yields: Row0 True Row1 True … Row64 True Row65 True Name: 0, Length: 66, dtype: bool but it should look like this (as a PandasDataframe): 0 [[112], [2790], [3495], [7564], [549498], [217… 1 [[[8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0… 2 [[4], [3], [3], [3], [2], [3], [4], [3], [3], … 3 [[[4]], [[4]], [[4]], [[6]], [[2]], [[6]], [[4… Name: 0, dtype: object (this is the result from the print call inside of the Python Source node above in code chunk I) So how do I get an numpy array as a node output? And why does the Python Source node creates some weird boolean output? Thanks in advance, Niklas

How to get an numpy array as output?

mlauber71 May 11, 2021, 12:08pm 10

@ricslator welcome to the KNIME forum

You could save a numpy array as a pickel file:

Or you could save it as a binary file or archive of files: