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|Azure Status| |Coverage status|
echo: Callback Properties in Python
===================================
Echo is a small library for attaching callback functions to property
state changes. For example:
::
class Switch(object):
state = CallbackProperty('off')
def report_change(state):
print 'the switch is %s' % state
s = Switch()
add_callback(s, 'state', report_change)
s.state = 'on' # prints 'the switch is on'
CalllbackProperties can also be built using decorators
::
class Switch(object):
@callback_property
def state(self):
return self._state
@state.setter
def state(self, value):
if value not in ['on', 'off']:
raise ValueError("invalid setting")
self._state = value
Full documentation is avilable `here <http://echo.readthedocs.org/>`__
.. |Azure Status| image:: https://dev.azure.com/glue-viz/echo/_apis/build/status/glue-viz.echo?branchName=master
:target: https://dev.azure.com/glue-viz/echo/_build/latest?definitionId=4&branchName=master
.. |Coverage Status| image:: https://codecov.io/gh/glue-viz/echo/branch/master/graph/badge.svg
:target: https://codecov.io/gh/glue-viz/echo
|
