Release: | 3.1.0 |
---|---|
Date: | November 01, 2014 |
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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | #!/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()
|
Download Source Code: hello.py:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | #!/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 0.0.0.0:8000
app = EchoServer(("0.0.0.0", 8000))
Debugger().register(app)
app.run()
|
Download Source Code: echoserver.py:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | #!/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", 8000))
Root().register(app)
app.run()
|
Download Source Code: helloweb.py:
More examples...
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
Alternatively, you may download the source package from the PyPi Page or the Downloads Page extract it and install using:
> python setup.py install
Note
You can install the development version via pip install circuits==dev.
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 is also a small community of circuits enthusiasts that you may find on the #circuits IRC Channel on the FreeNode IRC Network and the Mailing List.