Asynchronous Component based Event Application Framework
circuits is a Lightweight Event driven and Asynchronous Application Framework for the Python Programming Language with a strong Component Architecture.
circuits also includes a lightweight, high performance and scalable HTTP/WSGI compliant web server as well as various I/O and Networking components.
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#!/usr/bin/env python """circuits Hello World""" from circuits import Component, Event class hello(Event): """hello Event""" class App(Component): def hello(self): """Hello Event Handler""" print("Hello World!") def started(self, component): """Started Event Handler This is fired internally when your application starts up and can be used to trigger events that only occur once during startup. """ self.fire(hello()) # Fire hello Event raise SystemExit(0) # Terminate the Application App().run()
#!/usr/bin/env python """Simple TCP Echo Server This example shows how you can create a simple TCP Server (an Echo Service) utilizing the builtin Socket Components that the circuits library ships with. """ from circuits import handler, Debugger from circuits.net.sockets import TCPServer class EchoServer(TCPServer): @handler("read") def on_read(self, sock, data): """Read Event Handler This is fired by the underlying Socket Component when there has been new data read from the connected client. ..note :: By simply returning, client/server socket components listen to ValueChagned events (feedback) to determine if a handler returned some data and fires a subsequent Write event with the value returned. """ return data # Start and "run" the system. # Bind to port 0.0.0.0:9000 app = EchoServer(9000) Debugger().register(app) app.run()
#!/usr/bin/env python from circuits.web import Server, Controller class Root(Controller): def index(self): """Index Request Handler Controller(s) expose implicitly methods as request handlers. Request Handlers can still be customized by using the ``@expose`` decorator. For example exposing as a different path. """ return "Hello World!" app = Server(("0.0.0.0", 9000)) Root().register(app) app.run()
asynchronous I/O components
no required external dependencies
full featured web framework (circuits.web)
coroutine based synchronization primitives
circuits has no dependencies beyond the Python Standard Library.
Linux, FreeBSD, Mac OS X, Windows
Python 2.7, 3.4, 3.5, 3.6
pypy (the newer the better)
The simplest and recommended way to install circuits is with pip. You may install the latest stable release from PyPI with pip:
$ pip install circuits
If you do not have pip, you may use easy_install:
$ easy_install circuits
$ python setup.py install
circuits is licensed under the MIT License.
We welcome any questions or feedback about bugs and suggestions on how to improve circuits.
Let us know what you think about circuits. @pythoncircuits.
Do you have suggestions for improvement? Then please Create an Issue with details of what you would like to see. I’ll take a look at it and work with you to either incorporate the idea or find a better solution.
There are also several places you can reach out to the circuits community:
Whilst I (James Mills) continue to contribute and maintain the circuits project I do not represent the interests or business of my employer Facebook Inc. The contributions I make are of my own free time and have no bearing or relevance to Facebook Inc.
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