dhp.structures

DictDot

DictDot subclasses Python’s built-in dict object and offers attribute access to the dictionary. A little code says alot:

from dhp.structures import DictDot

my_dict = {'hovercraft': 'eels', 'speed': 42}
dicdot = DictDot(my_dict)
assert dicdot.hovercraft == 'eels'
assert dicdot.speed == 42

# ok, how about this?
dicdot = DictDot(hovercraft='eels', speed=42)
assert dicdot.hovercraft == 'eels'
assert dicdot.speed == 42

# or if your attacker has a pointed stick
dicdot = DictDot(my_dict, bunch='bananas')
assert dicdot.speed == 42
assert dicdot.bunch == 'bananas'

dicdot.new_value = 17
assert dicdot['new_value'] == 17
assert dicdot['hovercraft'] == 'eels'

# and now this ...
import json
assert json.dumps(dicdot) == '{"new_value": 17, "speed": 42, "hovercraft": "eels", "bunch": "bananas"}'

All of the methods and functions of a normal Python dictionary are present and available for you to use.

Use case: Those times when you don’t want to type [”...”] but still want the goodness that is Python’s dictionary.

ComparableMixin

To implment comparisions and sorting for your classes just subclass the mixin

and then implement the _cmpkey() method:

from dhp.structures import ComparableMixin

class Comparable(ComparableMixin):
    def __init__(self, value):
        self.value = value

    def _cmpkey(self):
        return self.value

The magic methods lt, le, eq, ge, gt are all implemented and NotImplemented is returned when appropriate. Easier to use than functools.total_ordering. see https://wiki.python.org/moin/HowTo/Sorting for information on how the output of _cmpkey will sort.