Python Examples

Collection of Python code examples for my blog F7L8C9.

Licensed under the MIT License. See file LICENSE.

Virtual Environments and Packages

Some examples need external libraries. Install these with pip.

• pip install <package> to install package
• pip install --upgrade <package> to upgrade installed package
• pip list - to list packages in the current environment
• pip list --outdated - to list outdated packages
• pip show <package> - to get details about a package that is installed in the current environment
• pip uninstall <package> to uninstall package

Create repeatable installations with the following commands.

pip freeze > requirements.txt
pip install -r requirements.txt

File requirements.txt should be checked into source control. See also Installing Python Modules.

Create virtual environments with the venv module.

python -m venv .venv

On Linux bash, activate environment with source .venv/bin/activate.

Or, alternatively with virtualenv.

virtualenv venv

Directory .venv/ should be ignored by source control.

See Pipenv for a more sophisticated virtualenv management tool.

See pyenv to set up and use several Python versions in parallel.

Links

• Community forums
• Connexion - OpenAPI support for Flask
• D-Bus
• Flask micro web framework
• OpenAPI Specification 2
• OpenAPI Specification 3
• PEP 8 -- Style Guide for Python Code
• Pyodide - a Python distribution for the browser and Node.js based on WebAssembly
• python-dotenv reads key-value pairs from a .env file and can set them as environment variables.
• Python Packaging Authority
  • PEP 621 – Storing project metadata in pyproject.toml
  • Writing your pyproject.toml - Python Packaging User Guide
• RustPython - Python interpreter written in Rust
• SQLite
• Status of Python versions
• Unleash Python SDK - system for feature flags / feature toggles
• Articles
  • Building Microservices with Python , Part I
• Data Science
  • Matplotlib
  • NumPy
  • pandas
  • Project Jupyter
  • scikit-learn
  • SciPy
  • Seaborn data visualization library
  • statsmodels
• Learning
  • Codecademy
  • freeCodeCamp
  • Python 3 - Rheinwerk Buch
  • W3Schools
• Testing
  • Hypothesis - a library for property-based testing
  • Locust - an open source load testing tool
  • pytest
  • tox

Tasks

• Write blog post about linear regression and plotting the results. See blog article