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Project Description

Bunch is a dictionary that supports attribute-style access, a la JavaScript.

>>> b = Bunch()
>>> b.hello = 'world'
>>> b.hello
'world'
>>> b['hello'] += "!"
>>> b.hello
'world!'
>>> b.foo = Bunch(lol=True)
>>> b.foo.lol
True
>>> b.foo is b['foo']
True

Dictionary Methods

A Bunch is a subclass of dict; it supports all the methods a dict does:

>>> b.keys()
['foo', 'hello']

Including update():

>>> b.update({ 'ponies': 'are pretty!' }, hello=42)
>>> print repr(b)
Bunch(foo=Bunch(lol=True), hello=42, ponies='are pretty!')

As well as iteration:

>>> [ (k,b[k]) for k in b ]
[('ponies', 'are pretty!'), ('foo', Bunch(lol=True)), ('hello', 42)]

And “splats”:

>>> "The {knights} who say {ni}!".format(**Bunch(knights='lolcats', ni='can haz'))
'The lolcats who say can haz!'

Serialization

Bunches happily and transparently serialize to JSON and YAML.

>>> b = Bunch(foo=Bunch(lol=True), hello=42, ponies='are pretty!')
>>> import json
>>> json.dumps(b)
'{"ponies": "are pretty!", "foo": {"lol": true}, "hello": 42}'

If JSON support is present (json or simplejson), Bunch will have a toJSON() method which returns the object as a JSON string.

If you have PyYAML installed, Bunch attempts to register itself with the various YAML Representers so that Bunches can be transparently dumped and loaded.

>>> b = Bunch(foo=Bunch(lol=True), hello=42, ponies='are pretty!')
>>> import yaml
>>> yaml.dump(b)
'!bunch.Bunch\nfoo: !bunch.Bunch {lol: true}\nhello: 42\nponies: are pretty!\n'
>>> yaml.safe_dump(b)
'foo: {lol: true}\nhello: 42\nponies: are pretty!\n'

In addition, Bunch instances will have a toYAML() method that returns the YAML string using yaml.safe_dump(). This method also replaces __str__ if present, as I find it far more readable. You can revert back to Python’s default use of __repr__ with a simple assignment: Bunch.__str__ = Bunch.__repr__. The Bunch class will also have a static method Bunch.fromYAML(), which loads a Bunch out of a YAML string.

Finally, Bunch converts easily and recursively to (unbunchify(), Bunch.toDict()) and from (bunchify(), Bunch.fromDict()) a normal dict, making it easy to cleanly serialize them in other formats.

Miscellaneous

  • It is safe to import * from this module. You’ll get: Bunch, bunchify, and unbunchify.

  • Ample doctests:

    $ python -m bunch.test -v
    

Feedback

Open a ticket at http://github.com/dsc/bunch or send me an email at dsc@less.ly .

Release History

Release History

1.0.1

This version

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

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1.0.0

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Download Files

Download Files

TODO: Brief introduction on what you do with files - including link to relevant help section.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
bunch-1.0.1.tar.gz (6.6 kB) Copy SHA256 Checksum SHA256 Source Dec 27, 2011
bunch-1.0.1.zip (11.1 kB) Copy SHA256 Checksum SHA256 Source Dec 27, 2011

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