Solution
Yes, the Python Node can call a function that uses a package, such as [External] NumPy. To do so, you must import the required packages in the same Python script where you define your function.
Below is an example script that imports the NumPy package. A function called MaxMinMean uses this to calculate the maximum, minimum and mean value of a given array.
# First, import NumPy.
import numpy as np
def MaxMinMean(lvarray):
"""
This function returns the maximu, minimum and mean
values of the "lvarray" in a list.
"""
# Convert LabVIEW array into NumPy array.
nparray = np.array(lvarray)
# Calculate the max, min and mean values.
arrmax = np.max(nparray)
arrmin = np.min(nparray)
arrmean = np.mean(nparray)
return [arrmax, arrmin, arrmean]
The code snippet below demonstrates how to call the MaxMinMean function from LabVIEW.
Note: This image is a LabVIEW snippet, which includes LabVIEW code that you can reuse in your project. To use a snippet, right-click the image, save it to your computer, and drag the file onto your LabVIEW diagram.