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FutureFinity is an asynchronous Python web framework designed for asyncio and native coroutines. Benefit from the non-blocking model and asyncio, FutureFinity can handle thousands of requests at the same time.

Let’s look at the Hello, World!.

import futurefinity.web

import asyncio

app = futurefinity.web.Application()

class RootHandler(futurefinity.web.RequestHandler):
    async def get(self, *args, **kwargs):
        return "Hello, World!"


except KeyboardInterrupt:

We have seen that Hello, World! example on the index of the documentation. It looks pretty easy, but some parts look like quite strange. Let’s divide them up step-by-step.

At the beginning of the example, there are two imports, which are futurefinity.web and asyncio. futurefinity.web is the core part when FutureFinity works as a Web Framework. asyncio is an asynchronous library included in Python as a standard library since Python 3.4. FutureFinity uses the EventLoop and TCP Protocol of asyncio.

For more information of asyncio, please visit asyncio on Python Docs.

Next line, app = futurefinity.web.Application() is going to create an instance of Application class. The duty of Application class is to create server, store all handlers, and handle request to right RequestHandler.

Let’s move to the class.

class RootHandler(futurefinity.web.RequestHandler):
    async def get(self, *args, **kwargs):
        return "Hello, World!"

Unlike Flask or Bottle, which use functions as request handlers, FutureFinity uses inherited classes from futurefinity.web.RequestHandler to handle requests. To specify the method to handle, please override the method as shown above. The returned string/bytes will be the body content. All methods should use a async def keyword instead of def to indicate that this is a coroutine function, not a normal function, which gives you the ability to use await statement in the function. On the top of the class, there is a @app.add_handler("/"). @ means that this is a decorator. The class or function below is decorated by the decorator. When the script is interpreted, the decorator is executed first, and the function or class is decorated at that time. Then when the function or class is executed or instanced, the decorated one will be executed or instanced.

For more information about async and await statement, please visit asyncio Tasks and Coroutines on Python Docs.

For more information about @ decorator, please visit decorator on Python Docs.

asyncio.get_event_loop().run_forever() is to get the event loop from asyncio and start it.

These are the basis of a minimal FutureFinity Application.