py-context 0.3.1

Description:

pycontext 0.3.1

Python dict with stacked context data

Free software: MIT license
GitHub: https://github.com/dealertrack/py-context


Installing
You can install py-context using pip:
$ pip install py-context


Example
>>> context = Context({'user': 'Fred', 'city': 'Bedrock'})
>>> context['user']
'Fred'
>>> context['city']
'Bedrock'
>>> context.push({'user': 'Barney'})
>>> context['user']
'Barney'
>>> context['city']
'Bedrock'
>>> context.pop()
{'user': 'Barney'}
>>> context['user']
'Fred'
Context also supports signals.
Signal handler can be attached globally:
>>> @context_key_changed.connect
... def handler(sender, context, key, new, old):
... print(key, new, old)

>>> context = Context()
>>> context['hello'] = 'world'
hello world <Missing>
Or to individual context instances:
>>> def handler(sender, context, key, new, old):
... print(key, new, old)
>>> context = Context()
>>> context_key_changed.connect(handler, sender=context)
Supported signals:
>>> @context_initialized.connect
... def handler(sender, context):
... pass

>>> @pre_context_changed.connect
... def handler(sender, context):
... pass

>>> @post_context_changed.connect
... def handler(sender, context):
... pass

>>> @context_key_changed.connect
... def handler(sender, context, key, new, old):
... pass
Additionally, ClassSignallingContext can be used to subscribe signals
by sender classes, not instances:
>>> class TestContext(ClassSignallingContext):
... pass
>>> def context_key_changed_handler(sender, context, key, new, old):
... print(key, new, old)
>>> _ = context_key_changed.connect(context_key_changed_handler, sender=TestContext)

>>> context = Context()
>>> class_context = TestContext()

>>> context['foo'] = 'bar'
>>> class_context['foo'] = 'bar'
foo bar <Missing>


Testing
To run the tests you need to install testing requirements first:
$ make install
Then to run tests, you can use nosetests or simply use Makefile command:
$ nosetests -sv
# or
$ make test


History

0.3.1 (2018-04-11)

Added support for *args, **kwargs in Context.push().
Added __dir__ support.



0.3.0 (2018-02-16)

Added signals support - context_initialized, pre_context_changed,
post_context_changed and context_key_changed. See README for examples.



0.2.1 (2017-07-28)

Excluding tests from being installed



0.2.0 (2017-05-11)

Add attribute support
Add make watch target



0.1.0 (2017-03-22)

First release on PyPI.




Credits
Originally Context was taken from Genshi project.
See LICENSE for copyright notices.

Development Lead

Miroslav Shubernetskiy - https://github.com/miki725



Contributors

Serkan Hosca - https://github.com/shosca

Copyright (C) 2006-2010 Edgewall Software
Copyright (C) 2017 Dealertrack Technologies, Inc.
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