i've got some issues with the installed Python 3.8.5 , whenever i try to import a package it shows an error which says : No module named '.....'

Question

>>> import matplotlib.pyplot as plt
Traceback (most recent call last):
  File "<console>", line 1, in <module>
ModuleNotFoundError: No module named 'matplotlib'

Answer 1

To install matplotlib for system python use commands below:

sudo apt-add-repository universe
sudo apt-get update
sudo apt-get install python3-matplotlib