How do I Install Python Packages with pip?

Introduction

Python packages are essential for expanding the functionality of your projects. The built-in package manager, pip, allows you to install and manage libraries efficiently. This guide will show you how to install Python packages using pip in VS Code.

Step 1: Ensure pip Is Installed

• Most Python installations come with pip pre-installed.
• To check if pip is installed, run the following command: pip --version
• If pip is not installed, update Python or install it manually using: python -m ensurepip --default-pip

Step 2: Install a Python Package

To install a package, use the pip install command followed by the package name.

• Example: To install requests, a popular HTTP library: pip install requests
• For a specific package version, specify it like this: pip install requests==2.26.0

Step 3: Install Multiple Packages from a Requirements File

• To install multiple dependencies at once, use a requirements.txt file.
• Inside the file, list packages line by line, e.g.:

  requests==2.26.0
  flask==2.0.1
  numpy

• Install all dependencies with: pip install -r requirements.txt

Step 4: Verify Installed Packages

• To check installed packages, use: pip list
• To see details about a specific package: pip show package_name

Step 5: Use pip Inside a Virtual Environment

• Always activate your virtual environment before installing packages.
• Activate the environment and then install dependencies:

  venv\Scripts\activate  # Windows
  source venv/bin/activate  # macOS/Linux
  pip install flask

Final Thoughts

Using pip is the easiest way to manage Python packages in VS Code. Whether installing a single package, multiple dependencies, or working within a virtual environment, this guide ensures you have the right setup.

Next Step: Learn why VS Code might not recognize your virtual environment and how to fix it: Why Is VS Code Not Recognizing My Virtual Environment?