This response also includes a copy of the new car with an id generated by the API. It’s important to send back an id in the response so that the user can modify the resource again. Now that you’ve covered endpoints, in the next section you’ll look at some options for formatting data in your REST API. By using Python and REST APIs, you can retrieve, parse, update, and manipulate the data provided by any web service you’re interested in.

In this article, we will build a REST API in Python using the Flask framework. Flask is a popular micro framework for building web applications. Since it is a micro-framework, it is very easy to use and lacks most of the advanced functionality which is found in a full-fledged framework. Now that we have some idea about what an API is and how it works, let us try to get our hands dirty by creating one
using Flask and then test it using Postman. For the sake of simplicity, we are going to read and write data to a CSV
file that contains information about users. We define all fields that make up the PlayerSchema similarly to the way in which the fields were defined for the Flask-SQLAlchemy Player Model.

Python and REST APIs: Interacting With Web Services

Here, you access response.status_code to see the HTTP status code. You can also view the response’s HTTP headers with response.headers. This dictionary contains metadata about the response, such as the Content-Type of the response. This code calls requests.get() to send a GET request to /todos/1, which responds with the todo item with the ID 1. Then you can call .json() on the response object to view the data that came back from the API. GET is one of the most common HTTP methods you’ll use when working with REST APIs.

restful api python flask

Web services that conform to the REST architectural style, called RESTful Web services, provide interoperability between computer systems on the internet. In addition, Flask also documented the usage of MethodView to allow developers to write their own restful APIs. In parallel, Flask-Restless promises to turn a SqlAlchemy class into a restful web service.

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By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. I had the similar requirement posted in the question but instead had to retrieve with using the table object. Incase, if any one is looking for the solution, this might work. Another prominent concept in the API industry is the acronym CRUD, which refers to four basic operations performed on database servers. In order to test our POST request, we’ll select POST from the dropdown menu. We then update our values using the key value forms provided.

restful api python flask

There’s always a chance that requests to your REST API could fail. It’s a good idea to define what an error response will look like. These responses should include a description of what error occurred along with the appropriate status code. The first step you’ll take as you build a REST API is to identify the resources the API will manage.


Besides the Transaction class, we also defined a TransactionSchema. We will use the latter to deserialize and serialize instances of Transaction from and to JSON objects. This class inherits from another superclass called Schema that belongs on a package not yet installed. Using dictionaries in a simple use case like the one above is enough.

We use the Flask framework and Flask_RESTful library an extension for flask which makes it fast and easy. Now create a class read_Delete which read and delete data from a CSV file and return Response. In this class we define function get This means that any GET Request on the url endpoint hit this function and delete function will hit by Delete request. Welcome to the complete guide on creating a REST API using Flask. In one of our previous articles, we learned the basics of web development using Flask and how to set it up. Flask is a popular micro framework that is used for building web applications.

Now its testing time

To test out GET and the other methods in this section, you’ll use a service called JSONPlaceholder. This free service provides fake API endpoints that send back responses that requests can process. REST APIs listen for HTTP methods like GET, POST, and DELETE to know which operations to perform on the web service’s resources.

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