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
35
36
37
38
39
40
41
42
|
# PyDispatcher Multi-producer Multi-consumer Observables
PyDispatcher provides the Python programmer with a multiple-producer-multiple-consumer signal-registration and
routing infrastructure for use in multiple contexts. The mechanism
of PyDispatcher started life as a highly rated [recipe](http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/87056)
in the [Python Cookbook](http://aspn.activestate.com/ASPN/Python/Cookbook/). The [project](https://github.com/mcfletch/pydispatcher) aims
to include various enhancements to the recipe developed during use in
various applications. It is primarily maintained by [Mike Fletcher](http://www.vrplumber.com). A derivative
of the project provides the Django web framework's "signal" system.
## Installation
PyDispatcher is available on PyPI via standard PIP:
```
pip install PyDispatcher
```
[](https://pypi.python.org/pypi/pydispatcher)
[](https://pypi.python.org/pypi/pydispatcher)
## Usage
[Documentation](https://mcfletch.github.io/pydispatcher/) is available
for detailed usage, but the basic idea is:
```
from pydispatch import dispatcher
metaKey = "moo"
MyNode = object()
event = {"sample": "event"}
def callback(event=None):
"""Handle signal being sent"""
print("Signal received", event)
dispatcher.connect(callback, sender=MyNode, signal=metaKey)
dispatcher.send(metaKey, MyNode, event=event)
```
|
