How Do I Get External Libraries to Work?

[sofalights]

I've been trying to get numpy and scikit-learn to work, since I'm using them to control a line-following robot. However, the following error occurs:

Traceback (most recent call last):
  File "betterRobo_wrgLRwehe.py", line 1, in <module>
ImportError: no module named 'numpy'

Does anyone know how to get them working? Thanks!
Code in question:

import numpy as np
from sklearn.linear_model import LogisticRegression
from pybricks.hubs import PrimeHub
from pybricks.pupdevices import Motor, ColorSensor, UltrasonicSensor
from pybricks.parameters import Port
from pybricks.tools import wait, StopWatch
import time

[laurensvalk]

Pybricks uses MicroPython, which is a small implementation of Python that can run on microcontrollers like those found in SPIKE Prime. Full Python with libraries like numpy require an actual computer like your PC or laptop (and can't run on the robot).

That said, line-following can work perfectly find without numpy. It all depends on what you want to do :)

[sofalights]

I've been using numpy to put the arrays for the logistic regression model (using scikit).
Here's the code lines where I use numpy:

# array elements are [H_left, S_left, V_left, H_right, S_right, V_right]
sensor_data = np.array([
    [0, 0, 0, 0, 0, 0],        
    [140, 100, 100, 0, 0, 0],  
    [0, 0, 0, 140, 100, 100],  
    [140, 100, 100, 140, 100, 100],  
    [250, 10, 90, 250, 10, 90],      
    [120, 10, 100, 120, 10, 100],    
    [0, 0, 0, 180, 100, 100],  
    [180, 100, 100, 0, 0, 0],  
])

# corresponding actions based on array (assign action val to array)
actions = np.array([5, 0, 1, 4, 5, 8, 7, 6])  #action label(in order of array appearance)

The elements are placeholders for now
I don't know if it is possible to use tuples though

[laurensvalk]

Yes, you can make lists or tuples, and even a Matrix. You can do basic Matrix operations like addition or multiplication but not inversion/regression etc.

In your case, if you just want to store values like that, you don't need the arrays. You can just make lists of lists:

sensor_data =[
    [0, 0, 0, 0, 0, 0],        
    [140, 100, 100, 0, 0, 0],  
    [0, 0, 0, 140, 100, 100],  
    [140, 100, 100, 140, 100, 100],  
    [250, 10, 90, 250, 10, 90],      
    [120, 10, 100, 120, 10, 100],    
    [0, 0, 0, 180, 100, 100],  
    [180, 100, 100, 0, 0, 0],  
]