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There are many other headers that you can find when inspecting a request or response. Have a look at Mozilla’s extended list if you’re curious about the specific use for each of them. Status codes are one of the most important pieces of information to look for in any API response.

Meanwhile, your Square class breaks that assumption by changing the behavior promised by the object’s interface. That could have surprising and unwanted consequences, which would likely be hard to debug. The concept of responsibility in this context may be pretty subjective. Having a single responsibility doesn’t https://remotemode.net/ necessarily mean having a single method. Responsibility isn’t directly tied to the number of methods but to the core task that your class is responsible for, depending on your idea of what the class represents in your code. However, that subjectivity shouldn’t stop you from striving to use the SRP.

An open RESTful API for Pokémon data

Now that we’ve installed and imported the requests library, let’s use it in our example. Leodanis is an industrial engineer who loves Python and software development. He’s a self-taught Python developer with 6+ years of experience. He’s an avid technical writer with a growing number of articles published on Real Python and other sites. Here, you pass a pair consisting of a rectangle and a square into a function that calculates their total area.

python api design

In doing so, we’ll familiarize ourselves with the basic elements of a good API. Considering APIs from the perspective of a user will come in useful when we begin to design our own API later in the lesson. Computer programs frequently need to communicate amongst themselves or with the underlying operating system, and APIs are one way they do it.

The code

By making API requests and parsing the returned JSON data, we can access up-to-date information on the ISS’s location and pass times. Now, the data variable holds a list of countries specifically in the Sub-Saharan Africa region. This shows how to effectively use query parameters supported by an API to refine data requests according to our requirements.

In the next section, we’ll allow users to find books via more specific data, such as an entry’s ID. You should see JSON output for the three entries in our test catalog. Flask provides us with a jsonify function flask rest api that allows us to convert lists and dictionaries to JSON format. In the route we created, our book entries are converted from a list of Python dictionaries to JSON before being returned to a user.

Python Guidelines: API Design

Before we get into the technical details, I first want give some background on the Factom Project. Given the obscene amount of money being blindly thrown into cryptocurrencies, it’s incredible how few blockchain services with any kind of practical application exist. It’s a perfect fit for any application that needs an immutable records system and was the natural choice for this project. Given that APIs are public facing, and anyone can use them, people with bad intentions often try to abuse them. To prevent such attacks, APIs use a technique called rate limiting, which restricts the number of requests that users can make in a given time frame. Here, you make a POST request to exchange the code for an access token.

If you have data you wish to share with the world, an API is one way you can get it into the hands of others. However, APIs are not always the best way of sharing data with users. If the size of the data you are providing is relatively small, you can instead provide a “data dump” in the form of a downloadable JSON, XML, CSV, or SQLite file. Depending on your resources, this approach can be viable up to a download size of a few gigabytes. Declaring the type of a path parameter will give you editor support inside of your function, with error checks, completion, and so on.

As we can see this version of our API serves a larger number of results, results that are stored in an SQLite database (books.db). When our user requests an entry or set of entries, our API pulls that information from the database by building and executing an SQL query. This iteration of our API also allows for filtering by more than one field.

python api design