Python

Python programming language and package management.

Read more about Python.

Table of Contents

• Configuration
• Virtual Environments
• Packages
• Utilities

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Configuration

# Show Python version
python3 --version

# Change global python version (Ubuntu/Debian)
sudo update-alternatives --config python3

# Show path of active Python interpreter
which python3

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Virtual Environments

# Create a virtual environment in the current directory
python3 -m venv [env-name]

# Activate virtual environment (Linux/macOS)
source [env-name]/bin/activate

# Activate virtual environment (Windows)
[env-name]\Scripts\activate

# Deactivate virtual environment
deactivate

# Remove virtual environment
rm -rf [env-name]

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Packages

# Upgrade pip itself
python3 -m pip install --upgrade pip

# Install a package
pip install [package-name]

# Install a specific version
pip install [package-name]==[version]

# Install from requirements file
pip install -r requirements.txt

# List installed packages
pip list

# List outdated packages
pip list --outdated

# Freeze installed packages to a requirements file
pip freeze > requirements.txt

# Uninstall a package
pip uninstall [package-name]

# Show package details
pip show [package-name]

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Utilities

# Check CSV validity
pip install csvkit
csvstat [file-path].csv

# Run a simple HTTP server (serves current directory on port 8000)
python3 -m http.server 8000

# Pretty-print a JSON file
python3 -m json.tool [file.json]

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