shackles 1.0

Recursive attribute tools.

Access and inspect attributes shackled to an object. Shackles is MIT Licensed.

Installation

To install configit, simply:

$ pip install shackles

API Documentation

shackles.broken(obj, chain)

Return name of first missing named attribute of object.

If chain is not broken (all attributes are represented in chain) nothing is returned.

# obj.a.b.e
assert shackles.broken(obj, 'a.b.c') == 'c'

shackles.get(obj, chain[, default])

Return value of final named attribute in chain of object.

If a named attribute does not exist, default is returned if provided, otherwise AttributeError is raised.

# obj.a.b
assert shackles.get(obj, 'a.b.c', 5) == 5

# obj.a.b.c = 6
assert shackles.get(obj, 'a.b.c', 5) == 6

shackles.has(obj, chain)

Return True if the chain of attributes exists on the object, False if not.

# obj.a.b.c
assert shackles.has(obj, 'a.b.c']) == True

shackles.walk(obj, chain)

Generate the values of the attributes in the chain by walking the named attributes in the chain from the object.

If a named attribute does not exist, default is returned if provided, otherwise AttributeError is raised.

# a = obj; b = obj; c = obj
# a.name = 'a'; b.name = 'b'; c.name = 'c'
# a.b = b; b.c = c
assert next(shackles.walk(a, 'b.c')).name == 'b'

For further examples refer to included tests.

Contribute

1. Fork the repository on Github to start making your changes to the develop branch (or branch off of it).

2. Install to your env or venv by running:

   $ python setup.py develop

3. Write a test which shows that the bug was fixed or that the feature works as expected.

4. Send a pull request and bug the maintainer until it gets merged and published. :) Make sure to add yourself to AUTHORS.