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FastAPI VS YAML

Compare FastAPI VS YAML and see what are their differences

FastAPI logo FastAPI

FastAPI is an Open Source, modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints.

YAML logo YAML

YAML 1.2 --- YAML: YAML Ain't Markup Language
  • FastAPI Landing page
    Landing page //
    2023-05-14
  • YAML Landing page
    Landing page //
    2021-10-22

FastAPI features and specs

  • High Performance
    Built on Starlette and Pydantic, FastAPI is one of the fastest frameworks for Python, providing high performance due to its asynchronous request handling.
  • Automatic Interactive API Documentation
    FastAPI automatically generates interactive API documentation via Swagger UI and ReDoc, which are very helpful for development and testing.
  • Type Checking and Validation
    With Pydantic models and Python type hints, FastAPI provides automatic data validation and type checking, reducing the chance of runtime errors.
  • Ease of Use
    Its syntax and design make it easy to learn for Python developers, offering a smooth development experience while reducing boilerplate code.
  • Asynchronous Support
    FastAPI supports asynchronous programming, allowing for better performance for I/O-bound operations, making it optimal for handling many simultaneous connections.
  • Extensive Documentation
    It has comprehensive and well-structured documentation, which is very useful for both beginners and advanced users.
  • Community and Ecosystem
    FastAPI has a growing community and ecosystem, with many plugins and integrations available to extend its functionality.

Possible disadvantages of FastAPI

  • Learning Curve for Asynchronous Programming
    Although FastAPI itself is easy to learn, grasping the concepts of asynchronous programming in Python can be challenging for beginners.
  • Complex Dependencies
    Using Pydantic for advanced validation can make the request models complex, requiring a deeper understanding of Pydantic and its functionalities.
  • Early Stage Libraries
    Some third-party libraries and extensions specifically tailored for FastAPI might still be in early stages of development and lack long-term stability.
  • Limited Real-World Examples
    Although the documentation is extensive, there might be limited real-world examples and case studies readily available compared to more mature frameworks.
  • Deployment Complexity
    Deploying FastAPI applications might be more complex in comparison to traditional synchronous frameworks, mainly due to the need for asynchronous server setups.

YAML features and specs

  • Human readability
    YAML is designed to be easy to read and write for humans, with a clean and simple syntax that avoids complexity, making it ideal for configuration files where human interaction is expected.
  • Hierarchical data representation
    YAML’s support for nested and hierarchical data structures allows for clear representation of complex data relationships, making it suitable for expressing data trees and other structured data.
  • Data interchange format
    Because it is a serialization language, YAML is versatile for both data interchange between programming languages and as configuration files, offering broad applications.
  • Simplicity
    YAML’s syntax deliberately avoids the use of complex elements like semicolons, braces, and quotes, which reduces the likelihood of syntax errors and makes the language less intimidating for users.
  • Support for various data types
    YAML supports a wide range of data types including strings, numbers, lists, and maps, which allows it to accurately represent data structures necessary for most applications.

Possible disadvantages of YAML

  • Whitespace sensitivity
    YAML relies heavily on indentation for data structure definitions, which can lead to errors if the document's whitespace is not carefully managed.
  • Lack of standard libraries
    Compared to JSON or XML, there are fewer robust YAML libraries available across various programming languages, potentially increasing the effort needed to implement YAML in certain applications.
  • Not ideal for all data types
    YAML does not natively support certain data types such as binary data or date/time values, requiring workarounds or extensions, which can complicate use cases that handle such data.
  • Less performant parsing
    YAML parsing is generally slower than JSON due to its complex syntax and flexible features, which can be a drawback in performance-critical applications.
  • Security concerns
    YAML parsers can be vulnerable to certain security risks like arbitrary code execution or entity expansion attacks, requiring additional precautions during parsing and validation.

Analysis of FastAPI

Overall verdict

  • FastAPI is widely regarded as a good choice, especially for applications that require high performance, scalability, and modern Python features. It is suitable for both simple and complex projects, making it a versatile tool in the web development ecosystem.

Why this product is good

  • FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+ based on standard Python type hints. It is built on top of Starlette for web framework capabilities and Pydantic for data validation and settings management. FastAPI is known for its excellent performance, automatic generation of interactive API documentation (with Swagger and Redoc), and support for asynchronous programming. Developers appreciate its ease of use, detailed documentation, and helpful error messages.

Recommended for

  • Developers building RESTful APIs
  • Teams looking for a high-performance ASGI-based web framework
  • Projects that require asynchronous programming capabilities
  • Applications needing automatic generation of interactive API documentation
  • Python developers who prefer utilizing type hints for code clarity and validation

FastAPI videos

FastAPI from the ground up

More videos:

  • Tutorial - 30 Days of Python - Day 14 - Web App with Flask, FastAPI, ngrok, and Invictify - Python TUTORIAL
  • Review - [PT] Python - API com FastAPI - Chat | twitch.tv/codeshow

YAML videos

YAML is for Computers. ksonnet is for Humans - Bryan Liles, Heptio (Any Skill Level)

More videos:

  • Review - YAML Release Pipelines in Azure DevOps - PRE06
  • Tutorial - Azure DevOps - How to Create a YAML Pipeline in DevOps (YAML Pipelines)

Category Popularity

0-100% (relative to FastAPI and YAML)
Developer Tools
86 86%
14% 14
API Tools
100 100%
0% 0
Configuration Management
0 0%
100% 100
Web Frameworks
100 100%
0% 0

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare FastAPI and YAML

FastAPI Reviews

  1. Kurslog team
    · Working at Kurslog ·

    When our backend team needs to build services for data parsing, aggregators, or high-load APIs, FastAPI is our absolute go-to choice. It completely lives up to its name-development speed is outstanding.

    The combination of Pydantic for data validation and built-in async support keeps our shared codebase clean, strictly typed, and reliable. But the biggest highlight for our cross-functional team is the automatic generation of interactive OpenAPI (Swagger) documentation. Our frontend and mobile developers no longer have to wait for backend engineers to manually update API docs; everything stays perfectly in sync automatically. It has drastically improved our team's communication and delivery speed.

    Pros:    Blazing fast performance (on par with nodejs and go)|Native asynchronous support out of the box|Automatic, interactive documentation generation (swagger/redoc)|Strict typing and data validation with pydantic
    Cons:    Smaller plug-and-play ecosystem compared to older frameworks like django|Requires our architects to design the project structure and directory layout from scratch

The 20 Best Laravel Alternatives for Web Development
FastAPI, as the name hints, is a swift mover. Built on Starlette, it’s all about speed and performance with Python. Crafting API masterpieces at the speed of light, now that’s something.
25 Python Frameworks to Master
Since its release in 2018, it has rapidly gained popularity due to its great performance and simplicity. In fact, according to PyPi Stats, FastAPI has over 9 million monthly downloads, surpassing even full-stack frameworks like Django.
Source: kinsta.com
3 Web Frameworks to Use With Python
myapp/ is the main directory of your FastAPI application. It includes all the other files and directories needed for the application.static/ is a directory used to store static assets such as CSS, JavaScript, and image files. These assets are served directly by the web server and are typically used to add visual styling and interactivity to the application.css/, img/, js/...
Best Alternatives to FastAPI App Free for Windows (2021)
FastAPI Alternative – So many alternatives app to FastAPI that you must to know out there. And, looking for an ideal software was not easy matter. Lucky you, at this page you can find the best replacement app for FastAPI. So what you are waiting for, get the latest FastAPI alternative app for Windows 10 from this page.
Top 5 Back-End Frameworks to Consider for Web Development in 2021
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints. It is fast when compared to other major Python frameworks like Flask and Django. FastAPI gives great flexibility to fulfill businesses’ API needs in today’s evolving world.

YAML Reviews

We have no reviews of YAML yet.
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Social recommendations and mentions

Based on our record, FastAPI should be more popular than YAML. It has been mentiond 312 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

FastAPI mentions (312)

  • I Built My First Machine Learning API — Here's Everything I Learned
    I used FastAPI, a Python framework built specifically for creating APIs quickly, with automatic validation and interactive documentation baked in. - Source: dev.to / 22 days ago
  • Shipping Sovereign SDK: Cryptographic Forensic Receipts and the End of the AI "Prose Tax"
    The Sovereign SDK is a Python-native framework designed to minimize prose overhead while generating ironclad, cryptographic execution receipts for AI agents, complete with drop-in FastAPI/Starlette ASGI middleware. - Source: dev.to / 3 months ago
  • 5-Minute AI Jobs and Closed Tabs — Why We Built Replay-Then-Tail SSE
    We had a feature in production where a single user request could run for five-plus minutes — fetch documents, chunk them, hit an LLM per chunk, synthesize a final answer. We did the obvious thing first: a FastAPI handler that ran the pipeline and streamed progress back to the browser over Server-Sent Events. - Source: dev.to / 4 months ago
  • FastAPI With LangChain and MongoDB
    FastAPI is a Python framework for building APIs quickly, efficiently, and with very little code. - Source: dev.to / 5 months ago
  • I Built A " CrowdSense AI " : A Scalable, Context-Aware Platform for Smart Stadiums
    Backend: Python-based FastAPI for its asynchronous I/O capabilities and rapid JSON serialization. - Source: dev.to / 5 months ago
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YAML mentions (46)

  • include-tidy: A Tool to Enforce Include-What-You-Use
    Unlike iwyu, I wanted Tidy to be fully configurable via files. The choices these days are JSON, TOML, XML, and YAML. IMHO, the least bad of these is TOML. Given that choice, the next task was to be able to parse TOML files. - Source: dev.to / 4 months ago
  • Git and Unity: A Comprehensive Guide to Version Control for Game Devs
    Unity stores its scenes, prefabs, and many other asset files in a YAML text format. For simple conflicts like a transform position change, you can edit the YAML files directly to merge the changes. - Source: dev.to / 4 months ago
  • Demystifying YAML: Your Essential Guide to Configuration Mastery
    Refer to Documentation: The official YAML website and Learn X in Y Minutes (YAML) are fantastic resources for quick syntax lookups. - Source: dev.to / 8 months ago
  • YAML Learning Guide - Complete Tutorial
    For more detailed documentation and examples, visit yaml.org and explore the extensive ecosystem of YAML tools and libraries available for your programming language of choice. - Source: dev.to / about 1 year ago
  • Data Broken - Opt out of the data broker nightmare with Privotron and Amazon Q Developer
    To this end Amazon Q Developer has been instrumental in making this application easy to extend by non-developers, allowing for the use of human-readable YAML "playbooks" that explain exactly how the opt out should work. It also was crucial at helping write clear documentation with meaningful examples. It also automated adding a number of convenience features, like user profiles so users do not have to re-enter... - Source: dev.to / over 1 year ago
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What are some alternatives?

When comparing FastAPI and YAML, you can also consider the following products

Flask - a microframework for Python based on Werkzeug, Jinja 2 and good intentions.

JSON - (JavaScript Object Notation) is a lightweight data-interchange format

Django - The Web framework for perfectionists with deadlines

TOML - TOML - Tom's Obvious, Minimal Language

ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple

Dhall Configuration Language - A non-repetitive alternative to YAML