YYDict

YYDict can convert a normal dictionary into a property dictionary. YYDict is a module that exposes a dictionary subclass that allows items to be set like attributes. Values are gettable and settable using both attribute and item syntax.

YYDict 可以将普通字典转换为属性字典。 YYDict 是一个模块，它公开了一个dictionary子类，允许像设置属性一样设置项。 使用属性和项语法，值是可获取和可设置的。

INSTALL

YYDict 安装也非常方便,只要使用pip 工具即可.

pip install yydict

USAGE

HOW TO USE THE YYDict ?

YYDict 使用起来非常方便,可以使用 obj.xxx 来访问字典中对应的key , 对于字典中的key 可以通过访问属性的方式进行访问.

from yydict import YYDict

>>> data = {'foo': 3, 'bar': {'x': 1, 'y': 2}}
... d = YYDict(data)
>>>
>>> d.foo
3
>>> d.bar
{'x': 1, 'y': 2}
>>> d.bar.x
1
>>> d.bar.y
2
>>> d.aaa
Traceback (most recent call last):
...
AttributeError: 'YYDict' object has no attribute 'aaa'

>>> # 转成 常规的词典
>>> regular  = d.to_dict()
>>> regular
{'foo': 3, 'bar': {'x': 1, 'y': 2}}
>>> data
{'foo': 3, 'bar': {'x': 1, 'y': 2}}
>>> data  == regular
True
>>> data is regular
False
>>> type(data),type(regular)
(<class 'dict'>, <class 'dict'>)


>>> d = YYDict({'foo':3})
>>> d['foo']
3
>>> d.foo
3
>>> d.bar
Traceback (most recent call last):
...
AttributeError: 'YYDict' object has no attribute 'bar'


Works recursively
>>> d = YYDict({'foo':3, 'bar':{'x':1, 'y':2}})
>>> isinstance(d.bar, dict)
True
>>> d.bar.x
1

Bullet-proof

>>> YYDict({})
{}
>>> YYDict(d={})
{}
>>> YYDict(None)
{}
>>> d = {'a': 1}
>>> YYDict(**d)
{'a': 1}
>>> YYDict((('a', 1), ('b', 2)))
{'a': 1, 'b': 2}

Set attributes

>>> d = YYDict()
>>> d.foo = 3
>>> d.foo
3
>>> d.bar = {'prop': 'value'}
>>> d.bar.prop
'value'
>>> d
{'foo': 3, 'bar': {'prop': 'value'}}
>>> d.bar.prop = 'newer'
>>> d.bar.prop
'newer'


>>> # Values extraction
>>> d = YYDict({'foo':0, 'bar':[{'x':1, 'y':2}, {'x':3, 'y':4}]})
>>> isinstance(d.bar, list)
True
>>> from operator import attrgetter
>>> list(map(attrgetter('x'), d.bar))
[1, 3]
>>> list(map(attrgetter('y'), d.bar))
[2, 4]
>>> d = YYDict()
>>> list(d.keys())
[]
>>> d = YYDict(foo=3, bar=dict(x=1, y=2))
>>> d.foo
3
>>> d.bar.x
1

Still like a dict though

>>> o = YYDict({'clean':True})
>>> list(o.items())
[('clean', True)]

And like a class

>>> class Flower(YYDict):
...     power = 1
...     mean = {}
...     color = {"r": 100, "g": 0, "b": 0}
...
>>> f = Flower()
>>> f.power
1
>>> f.color.r
100
>>> f.mean.x = 10
>>> f.mean.x
10
>>> f = Flower({'height': 12})
>>> f.height
12
>>> f['power']
1
>>> sorted(f.keys())
['color', 'height', 'mean', 'power']

update and pop items
>>> d = YYDict(a=1, b='2')
>>> e = YYDict(c=3.0, a=9.0)
>>> d.update(e)
>>> d.c
3.0
>>> d['c']
3.0
>>> d.get('c')
3.0
>>> d.update(a=4, b=4)
>>> d.b
4
>>> d.pop('a')
4
>>> d.a
Traceback (most recent call last):
...
AttributeError: 'YYDict' object has no attribute 'a'

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