[Python] Why does Visual Studio Code recognize numpy but not matplotlib.pyplot in Python?

In Visual Studio Code, I can use numpy library but not the matplotlib.pyplot library even though I have installed both

The example code in visual studio code:

mport matplotlib.pyplot as plt

import numpy as np

xpoints = np.array([0, 6])
ypoints = np.array([0, 250])
plt.plot(xpoints, ypoints)

plt.show()


I get in the terminal

ModuleNotFoundError: No module named 'matplotlib.pyplot'; 'matplotlib' is not a package

However, when I type pip3 show matplotlib, I get the message that it is alr installed:

Name: matplotlib
Version: 3.7.1
Summary: Python plotting package
Home-page: https://matplotlib.org
Author: John D. Hunter, Michael Droettboom
Author-email: matplotlib-users@python.org
License: PSF
Location: /home/huinker/.local/lib/python3.10/site-packages


However, VS code works with other library like numpy. Example code

import numpy
A, B=numpy.array(list(map(int, input().split()))), numpy.array(list(map(int, input().split())))
print (numpy.inner(A, B))
print (numpy.outer(A, B))


the code works with numpy library. when i try in the termial pip3 show numpy:

Name: numpy
Version: 1.24.3
Summary: Fundamental package for array computing in Python
Home-page: https://www.numpy.org
Author: Travis E. Oliphant et al.
Author-email:License: BSD-3-Clause
Location: /home/huinker/.local/lib/python3.10/site-packages
Requires:
Required-by: contourpy, matplotlib


What is my problem with the environment?

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