How to install a Python Module?

A Python module is a file containing Python definitions and statements. Modules help us organize code into smaller, manageable pieces and enable code reuse across multiple programs. To use external modules in your Python projects, you need to install them using package managers like pip or conda.

Using PIP to Install Modules

PIP is the standard package manager for Python modules. It comes pre-installed with Python 3.4 and later versions. Use pip to install packages from the Python Package Index (PyPI).

Installing a Package

Open a command prompt or terminal and use the following command to install a module ?

C:\Users\Username> pip install requests

This installs the latest version of the requests module and its dependencies.

Collecting requests
  Downloading requests-2.31.0-py3-none-any.whl (62 kB)
Installing collected packages: requests
Successfully installed requests-2.31.0

Installing Specific Versions

To install a specific version of a package ?

pip install requests==2.28.0

To install within a version range ?

pip install 'requests>=2.25.0,<2.30.0'

Checking PIP Version

Verify your pip installation and version ?

pip --version

pip 22.2.2 from C:\Python310\lib\site-packages\pip (python 3.10)

Installing PIP (if missing)

If pip is not available on Python 3.4+, run this command ?

python -m ensurepip --upgrade

Using Conda Package Manager

Conda is an open-source package and environment management system that runs on Windows, macOS, and Linux. It can install packages from multiple channels and manage dependencies efficiently.

Searching for Packages

Check if a package is available before installing ?

conda search numpy

Loading channels: done
# Name           Version           Build       Channel
numpy            1.21.5   py38h2bbff1b_0   pkgs/main
numpy            1.21.5   py39h2bbff1b_0   pkgs/main  
numpy            1.24.0   py38h2bbff1b_0   pkgs/main
numpy            1.24.0   py39h2bbff1b_0   pkgs/main

Installing Packages with Conda

Install a package using conda ?

conda install numpy

Collecting package metadata: done
Solving environment: done

## Package Plan ##
  environment location: C:\Users\Username\anaconda3
  
  added / updated specs:
    - numpy

The following NEW packages will be INSTALLED:
  numpy    pkgs/main/win-64::numpy-1.24.0-py39h2bbff1b_0

Proceed ([y]/n)? y

Downloading and Extracting Packages
numpy-1.24.0         | 4.6 MB    | ############ | 100%
Preparing transaction: done
Verifying transaction: done
Executing transaction: done

Comparison

Verifying Installation

After installing a module, verify it works by importing it in Python ?

import requests
print("Requests version:", requests.__version__)

Requests version: 2.31.0

Conclusion

Use pip for standard Python package installation from PyPI. Use conda when you need advanced dependency management and virtual environments. Both tools make it easy to install and manage Python modules for your projects.