Utilities for traversing and transforming data structures
Project description
schleppy
========
Utilities for traversing and transforming data structures
Inspired by Hapi framework for .js (especially the Hoek plugin), I really missed some of these utilities in python so decided to port them over.
reach(source, pattern, [options])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
`Insipred by Hoek.reach <https://github.com/hapijs/hoek/blob/master/API.md#reachobj-chain-options>`_
Converts an object key chain string to reference
* ``options`` - optional settings
* ``separator`` - string to split chain path on, defaults to '.'
* ``default`` - value to return if the path or value is not present, default is ``None``
* ``strict`` - if ``true``\ , will throw an error on missing member, default is ``False``
A pattern including negative numbers will work like negative indices on an
array.
If pattern is ``False-y``\ , the object itself will be returned.
.. code-block:: python
from schleppy import reach
pattern = 'a.b.c'
source_obj = {'a' : {'b' : { 'c' : 1}}}
reach(source_obj, pattern) # returns 1
pattern = 'a.b.-1'
source_obj = {'a' : {'b' : [2,3,6]}}
reach(source_obj, pattern) # returns 6
transform(source, transform, [options])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
`Insipred by Hoek.reach <https://github.com/hapijs/hoek/blob/master/API.md#transformobj-transform-options>`_
Transforms an existing object into a new one based on the supplied ``obj`` and ``transform`` map. ``options`` are the same as the ``reach`` options. The first argument can also be an array of objects. In that case the method will return an array of transformed objects. Note that ``options.separator`` will be respected for the keys in the transform object as well as values.
.. code-block:: python
from schleppy import transform
source = {
'address': {
'one': '123 main street',
'two': 'PO Box 1234'
},
'title': 'Warehouse',
'state': 'CA'
}
result = transform(source, {
'person.address.lineOne': 'address.one',
'person.address.lineTwo': 'address.two',
'title': 'title',
'person.address.region': 'state'
})
# Results in
# {
# 'person': {
# 'address': {
# 'lineOne': '123 main street',
# 'lineTwo': 'PO Box 1234',
# 'region': 'CA'
# }
# },
# 'title': 'Warehouse'
# }
Project details
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
schleppy-1.0.0.tar.gz
(4.2 kB
view hashes)