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dotted 0.1.4

Access dicts and lists with a dotted path notation.

dotted

A Python library that provides a method of accessing lists and dicts with a dotted path notation. It is useful to access a deep path inside a complex object composed of lists and dicts.

Quick & Dirty:

from dotted.collection import DottedCollection, DottedDict, DottedList

obj = DottedCollection.factory(dict_or_list)
obj = DottedCollection.load_json(json_value)
obj = DottedDict(a_dict)
obj = DottedList(a_list)

from dotted.utils import dot, dot_json

obj = dot(dict_or_list)
obj = dot_json(json_value)

DottedDict and DottedList have the same accessors as dict and list so you can iterate them as usual. Both type of objects support access via a dotted path key.

Examples

Example #1: DottedList

obj = DottedList([0, 1, 2, 3, [4, 5, 6], 7, 8, [9, 10]])

All of these are true:

obj[0]     ==  0
obj['1']   ==  1
obj['4.0'] ==  4
obj['4.2'] ==  6
obj[5]     ==  7
obj['7.1'] == 10

If you want to append you can do:

obj.append(12)

or:

obj[8] = 11

but the latter only works if index == len(obj). In other case you will get a very pretty exception.

Example #2: DottedDict

obj = DottedDict({'hello': {'world': {'wide': 'web'}}})

All of these are true:

obj['hello'] == {'world': {'wide': 'web'}}
obj['hello.world'] == {'wide': 'web'}
obj['hello.world.wide'] == 'web'

obj.hello == {'world': {'wide': 'web'}}
obj.hello.world == {'wide': 'web'}
obj.hello.world.wide == 'web'

Example #3: Both working together

obj = DottedCollection.factory({
    'hello': [{'world': {'wide': ['web', 'web', 'web']}}]
})

You can access:

obj['hello'][0]['world']['wide'][0]
obj.hello[0].world.wide[0]
obj.hello[0].world['wide'][0]
obj.hello[0].world['wide.0']
obj.hello['0.world'].wide[0]
...
obj['hello.0.world.wide.0']

Example #4: When new values are dicts or lists

obj = DottedCollection.factory(some_obj)

obj['some.path'] = {'hello': 'world'}  # will be converted to a DottedDict
obj['another.path'] = ['hello']  # will be converted to a DottedList

Example #5: Shortcuts

from dotted.utils import dot, dot_json

obj = dot({'hello': 'world'})
obj = dot_json('{"hello": "world"}')

Example #6: Keys with dots inside!

Well, you can actually use escaped keys, but it’s better to avoid them:

from dotted.utils import dot, dot_json
obj = dot({"hello\.world": "Hello!"})
obj = dot_json('{"hello\\\\.world": "Hello!"}')
value = obj["hello\.world"]  # Hello!

That’s all!

Tests

Run in the terminal from the parent directory:

python -m dotted.test.test_collection

Special Thanks

 
File Type Py Version Uploaded on Size
dotted-0.1.4.tar.gz (md5) Source 2015-08-21 8KB
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  • Author: Carlos Escribano Rey
  • Home Page: https://github.com/carlosescri/DottedDict
  • License:
    The MIT License (MIT)
    
    Copyright (c) 2014 Carlos Escribano Rey
    
    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:
    
    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.
    
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.
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