yydict 0.0.2

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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