Run a Basic Python Flask Restful API Ruan Bekker’s Blog

This can be tricky to do right and would have to be done everywhere user data interacts with the database. Unlike programming languages like Python, SQL doesn’t define how to get the data. SQL describes what data is desired and leaves the how up to the database engine. With conn.execute() you’re running the SQL command to create a person table with the columns id, lname, fname, and timestamp. The modifications that you’ll make to the program will move all the data to a database table.

Can Python be used for REST API?

One of the most popular ways to build APIs is the REST architecture style. Python provides some great tools not only to get data from REST APIs but also to build your own Python REST APIs.

We created a memory database of tasks, which is nothing more than a plain and simple array of restful api python flask dictionaries. Each entry in the array has the fields that we defined above for our tasks.

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If you’re familiar with NPM or Ruby’s bundler, it’s similar in spirit to those tools. Therefore, let’s check if we need to install pip separately or already have it. Flask-RESTful provides an extension to Flask for building REST APIs. Flask-RESTful was initially developed as an internal project at Twilio, built to power their public and internal APIs. Next we can test our PUT method, this is done similarly to our POST request except that the body of the request should also include an ID. Before and after formattingIn the above Gist, you can see two JSON objects, the first is how our documents are formatted when we receive them from the find method. As you can see in the top object the _id has another object as the value, which contains the document id within it.

  • I hope you have the Flask installed; otherwise, use the PIP command and install it using the below code.
  • First, run the above file, which will give you the localhost URL, and in another command prompt, run the below code file.
  • Nothing irritates me more than using a JSON API which returns HTML when an error occurs, so I was keen to put in some reasonable error handling to avoid this happening.
  • Though, as mentioned, we will use marshmallow to serialize and deserialize entities through our endpoints.

Look at Google Dev Tools, you’ll see the content-type change to JSON. To facilitate the process, we currently manipulate incomes as dictionaries. However, we will soon create classes to represent incomes and expenses. Flask provides great documentation on what exactly this does. Sh to get similar results as when executing the “Hello, world!” application.

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We tolerate a missing description field, and we assume the done field will always start set to False. If we find the task then we just package it as JSON with jsonify and send it as a response, just like we did before for the entire collection. If you read my Flask Mega-Tutorial series you know that Flask is a simple, yet very powerful Python web framework.

This means that the data will be saved to your disk and will exist between runs of the program. Currently, you’re storing the data of your Flask project in a dictionary. That means that any data changes get lost when you restart your Flask application. On top of that, the structure of your dictionary isn’t ideal.

Creating the API

Next let’s work on adding new temperature readings to the newly created room. For this, we’d expect the client to send a request that contains the temperature reading and the room id. In the following example we are using the jsonify method to convert a dictionary called person1 into a JSON string before returning it to the client. A strong API can be considered the backbone of a potentially limitless number of projects or avenues of research. In many cases, it makes sense to first create an API interface to your core data or functionality before extrapolating on it to create a visualization, application, or website. Not only does it make your work accessible to researchers working on other projects, but it often leads to a more comprehensible and maintainable project. Relational databases allow for the storage and retrieval of data, which is stored in tables.

restful api python flask

In short, that means that they will work on Linux, Mac OS X and also on Windows if you use Cygwin. The commands are slightly different if you use the Windows native version of Python. We introduce the Flask-Smorest extension, a library that greatly simplifies writing REST APIs using Flask. It also provides things like automated documentation generation.

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To achieve this, you’ll extend both the swagger.yml and files to fully support the API defined above. You can even try the endpoint out by clicking the Try it out button. The Swagger UI API documentation gives you a way to explore and experiment with the API without having to write any code to do so. In line 5, you create a helper function named get_timestamp() that generates a string representation of the current timestamp. You’ll extend the home.html file later to work with the REST API that you’re developing.

restful api python flask

Using SQLAlchemy allows you to think in terms of objects with behavior rather than dealing with raw SQL. This becomes even more beneficial when your database tables become larger and the interactions more complex. Inheriting from db.Model gives Person the SQLAlchemy features to connect to the database and access its tables.

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