How to Build Simple RESTful APIs with Python and Flask DEV Community

The first item in the recipe defines that we will create our Docker container based on the default Python 3 Docker image. Having pipenv, we define the working directory we will use in the image and copy the code needed to bootstrap and run the application. In the fourth step, we use pipenv to install all our Python dependencies. Lastly, we define that our image will communicate through port 5000 and that this image, when executed, needs to run the script to start Flask. To conclude, Flask provides the necessary tools and libraries to handle routing, request handling, and response generation. Combined with libraries such as SQLAlchemy, Flask seamlessly work with Object-Relational Mapping toolkits to provide a complete API solution.

  • In part two of this series, you’ll learn how to use a proper database to store your data permanently instead of relying on in-memory storage as you did here.
  • To run this Flask application, you first need to set an environment variable called FLASK_APP to
  • In this three-part tutorial series, you’ll build a REST API to keep track of notes for people that may visit you throughout the year.
  • So, when the API gets an HTTP request for GET /api/people, your Flask app calls a read_all() function within a people module.
  • The PersonSchema class defines how the attributes of a class will be converted into JSON-friendly formats.

Django REST framework returns a 201 Created status code and the new Country. Django will use this model to create the database table and columns for the country data. Most of the time, data sent from a REST API comes from a database. Connecting to a database is beyond the scope of this tutorial. For the examples below, you’ll store your data in a Python list.

Create Your First Rest API

You’ll have to import request from flask to identify the type of method used. Routes are considered to be endpoints, you can create different routes for your endpoints that use different methods. To run the appliaction, we have to complete a few things first.

restful api python flask

In line 7, you tell the app instance to read the swagger.yml file from the specification directory and configure the system to provide the Connexion functionality. The Swagger configuration file is a YAML or JSON file containing your OpenAPI definitions. To also make use of auto-generated API documentation, you install Connexion with the added support for Swagger UI. Later in this tutorial, you’ll learn more about the Python packages that you just installed. In this case, you name the root folder of your project rp_flask_api/.

REST and Python: Consuming APIs

To keep things consistent, you’ll use countries as your main endpoint for all three frameworks. You’ll also use JSON as your data format for all three frameworks. In this section, you’ll look at three popular frameworks for building REST APIs in Python. Each framework has pros and cons, so you’ll have to evaluate which works best for your needs. To this end, in the next sections, you’ll look at a REST API in each framework.

Once unpublished, this post will become invisible to the public and only accessible to JeffUbayi. Once unpublished, all posts by carter will become hidden and only accessible to themselves. Its just a quotation name I gave to the static_file, receiving the request. I am a final year undergraduate who loves to learn and write about technology. I am learning and working in data science field from past 2 years, and aspire to grow as Big data architect. So you remove the import in line 4 and add the imports for config in line 5 and Person in line 6.

How to Build Simple RESTful APIs with Python and Flask

Next up, you’ll use requests.patch() to modify the value of a specific field on an existing todo. PATCH differs from PUT in that it doesn’t completely replace the existing resource. It only modifies the values set in the JSON sent with the request. Now that you’ve got requests installed, you can start sending HTTP requests.

restful api python flask

It just sets a software architectural style for writing web applications and APIs and simplifies the interfaces within and outside the application. Web service APIs that are written to follow the REST principles are called RESTful APIs. You raise the error response when the request body doesn’t contain a last name or when a person with this last name already exists. The import connexion statement adds the module to the program. The next step is creating the application instance using Connexion rather than Flask.

The authentication extension gives us the freedom to choose which functions in the service are open and which are protected. In my opinion this is a serious problem that should always be addressed. Well, we are done with the functionality of our service, but we still have a problem. The problem with the current design of the API is that clients are forced to construct URIs from the task identifiers that are returned. I will assume you know the basics of working with Python in your platform. The example command lines I will show below are for a Unix-like operating system.

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