Workarounds) to implement using sync/WSGI. This leads to significant performance improvements.įurthermore, ASGI servers and frameworks also give you access to inherently concurrentįeatures (WebSockets, Server-Sent Events, HTTP/2) that are impossible (or at least require With FastAPI, your application will behave in a non-blocking way throughout the stack, concurrencyĪpplies at the request/response level. Servers, applications, middleware, and individual components. It enables interoperability within the whole Python async web stack: Within path operations, your Flask server will still tie up a worker for each request.įastAPI on the other hand implements the ASGI specification.ĪSGI is a standard interface positioned as a spiritual successor to WSGI. Versions of Flask (2.x) you can get a performance boost by making use of an event loop However, Flask is fundamentally constrained in that it is a WSGI application. (Both frameworks use decorators to mark ( '/' ) async def read_results (): results = await some_library () return results In this regard, Flask (as of v2.x) and FastAPI are identical. In practice, this means declaring coroutine functions with the async keyword, and using theĪwait keyword with any IO-bound parts of the code. Who also created the Django REST Framework). from a client browser)įastAPI is built on top of Starlette, an ASGIįramework created by Tom Christie (he is a Python community powerhouse IO-bound network code (which is most APIs), where you have to wait for something, for example: Which was added in Python 3.4 and allows you to write concurrent code. How is this possible in slow old Python? Under the hood, FastAPI is leveraging Python’s asyncio library, Naturally, benchmarks should be taken with a pinch of salt, have a look at the source of these The sort of high-performance you would expect from traditionally faster languages like NodeJS The FastAPI toolboxįastAPI’s name may lack subtlety, but it does what it says on the tin. FastAPI’s elegant dependency injection 4. How FastAPI reduces your errors with Python type declarations and Pydantic 3. I’m willing to concede that a better title for this post would be “why use FastAPI instead of Flask”. This post compares and discusses code from an example Flask and FastAPI project. This particular web framework that makes it worth switching away from your tried-and-tested Flask APIs? It was good decision too because I found the lead designer wants to make the frontend in Vue.js.More and more people are getting onboard the FastAPI train. So it provides some designed encapsulation.Įdit: I'm currently using it to segment out my webapps code. Įssentially one benefit that is mentioned in the link and provides me a clear idea of it's real world usage is that I can effectively logically organize/divide the app into several parts that only need to be concerned with it's own affairs. However, I stumbled up this page which puts it in very very laymens (and quite hilarious present-day events) terms. At first I thought it was like C#/Java OOP Interface Implementation style where you define some stuff but dont have to worry about it implementation details til later. I too just stumbled up this myself and was confused after reading a few of the documentation sources. Once it is created it may be "impressed" on the application by using the register_blueprint function - this "impresses" the mold of the blueprint on the application at the locations specified by url_prefix. By itself, it is a hollow shell - it cannot route, it cannot respond, until it is impressed upon an application: from tree_workshop import tree_moldĪpp.register_blueprint(tree_mold, url_prefix="/oak")Īpp.register_blueprint(tree_mold, url_prefix="/fir")Īpp.register_blueprint(tree_mold, url_prefix="/ash") This is a simple mold for working with trees - it says that any application that deals with trees should provide access to its leaves, its roots, and its rings (by year). Return "Looking at the rings for ".format(year=year) Each time you apply it the blueprint will create a new version of its structure in the plaster of your application. You can take the blueprint and apply it to your application in several places. A blueprint is a template for generating a "section" of a web application.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |