Modules and Libraries in Python – How to Import and Work with Them

Published by Mateusz Kędziora on 2023-01-042023-01-04

Modules and libraries in Python are sets of code that we can use in our projects. Modules are single files with code, while libraries are sets of modules that are related and provide additional functionality.

To use a module or library in our code, we first need to import it. We can do this using the import command, for example import math or import os. We can also import specific elements from a module or library, for example from math import pi or from os import listdir.

Working with files is an important part of programming, and Python offers many tools for file handling. We can open, save, read and modify files using functions and methods available in the Python standard library, such as open(), read(), write() and close().

Exception handling, or handling errors, is another important aspect of programming. In Python, we have the try-except mechanism, which allows us to handle exceptions, or exceptional situations that may occur during the operation of the program. This allows us to prevent application crashes and better manage errors.

Here is an example of how to import a library:

import lib_name
import module_name from lib_name

To summarize, modules and libraries in Python are very useful tools that allow us to extend the functionality of our programs. Importing them and working with them is a basic skill for any Python programmer, and handling files and errors is key to writing solid and reliable code.

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