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API Integration

The majority of production Python web applications rely on several externally hosted application programming interfaces (APIs). APIs are also commonly referred to as third party services or external platforms. Examples include Twilio for messaging and voice services, Stripe for payment processing and Disqus for embedded webpage comments. There are many articles about proper API design but best practices for integrating APIs is less commonly written about. However, this subject continuously grows in importance because APIs provide critical functionality across many implementation areas.

API Integration Resources

APIs for Beginners is an awesome free video course that shows how to use APIs and add them to applications with a bunch of useful code examples. Some developers prefer to use Requests instead of an API's helper library. In that case check out this tutorial on using requests to access web APIs. How to Debug Common API Errors talks about the 1xx through 5xx status codes you will receive when working with HTTP requests and what to do when you get some of the more common ones such as 403 Forbidden and 502 Bad Gateway. Product Hunt lists many commonly used commercial and free web APIs to show "there's an API for everything". There's a list of all government web APIs at 18F's API-All-the-X list. The list is updated whenever a new API comes online. The Only Type of API Services I'll Use explains how alignment between usage and pricing is crucial to a solid, long-lasting API experience. Other models such as tiered usage and enterprise upsells typically lead to terrible developer experiences and should generally be avoided when building applications with APIs. John Sheehan's "Zen and the Art of API Maintenance" slides are relevant for API integration. This post on "API Driven Development" by Randall Degges explains how using APIs in your application cuts down on the amount of code you have to write and maintain so you can launch your application faster. Retries in Requests is a nice tutorial for easily re-executing failed HTTP requests with the Requests library. If you're looking for a fun project that uses two web APIs within a Django application, try out this tutorial to Build your own Pokédex with Django, MMS and PokéAPI. vcr.py is a way to capture and replay HTTP requests with mocks. It's extremely useful for testing API integrations. Caching external API requests is a good post on how to potentially limit the number of HTTP calls required when accessing an external web API via the Requests library. Working with APIs the Pythonic way does a nice job walking through creating a naive web API client, building on it with better error handling and then explaining how to test it by mocking out the service.

API integration learning checklist

Pick an API known for top notch documentation. Here's a list of ten APIs that are a good starting point for beginners. Read the API documentation for your chosen API. Figure out a simple use case for how your application could be improved by using that API. Before you start writing any code, play around with the API through the commandline with cURL or in the browser with Postman. This exercise will help you get a better understanding of API authentication and the data required for requests and responses. Evaluate whether to use a helper library or work with Requests. Helper libraries are usually easier to get started with while Requests gives you more control over the HTTP calls. Move your API calls into a task queue so they do not block the HTTP request-response cycle for your web application.

What's next after integrating web APIs into your project?

How do I create an API for my web application? How do I log errors that occur in my application? What can I do to mitigate security vulnerability in my web app?

Full Stack Python

Full Stack Python is an open book that explains concepts in plain language and provides helpful resources for those topics.

Updates via Twitter & Facebook.

Chapters

1. Introduction 2. Development Environments 3. Data 4. Web Development » API Integration 5. Deployment 6. DevOps Changelog What Full Stack Means About the Author Future Directions Page Statuses ...or view the full table of contents.

Matt Makai 2012-2022