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class EasyDict(dict):
"""
Get attributes
>>> d = EasyDict({'foo':3})
>>> d['foo']
3
>>> d.foo
3
>>> d.bar
Traceback (most recent call last):
...
AttributeError: 'EasyDict' object has no attribute 'bar'
Works recursively
>>> d = EasyDict({'foo':3, 'bar':{'x':1, 'y':2}})
>>> isinstance(d.bar, dict)
True
>>> d.bar.x
1
Bullet-proof
>>> EasyDict({})
{}
>>> EasyDict(d={})
{}
>>> EasyDict(None)
{}
>>> d = {'a': 1}
>>> EasyDict(**d)
{'a': 1}
Set attributes
>>> d = EasyDict()
>>> 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 = EasyDict({'foo':0, 'bar':[{'x':1, 'y':2}, {'x':3, 'y':4}]})
>>> isinstance(d.bar, list)
True
>>> from operator import attrgetter
>>> map(attrgetter('x'), d.bar)
[1, 3]
>>> map(attrgetter('y'), d.bar)
[2, 4]
>>> d = EasyDict()
>>> d.keys()
[]
>>> d = EasyDict(foo=3, bar=dict(x=1, y=2))
>>> d.foo
3
>>> d.bar.x
1
Still like a dict though
>>> o = EasyDict({'clean':True})
>>> o.items()
[('clean', True)]
And like a class
>>> class Flower(EasyDict):
... power = 1
...
>>> f = Flower()
>>> f.power
1
>>> f = Flower({'height': 12})
>>> f.height
12
>>> f['power']
1
>>> sorted(f.keys())
['height', 'power']
update and pop items
>>> d = EasyDict(a=1, b='2')
>>> e = EasyDict(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: 'EasyDict' object has no attribute 'a'
"""
def __init__(self, d=None, **kwargs):
if d is None:
d = {}
if kwargs:
d.update(**kwargs)
for k, v in d.items():
setattr(self, k, v)
# Class attributes
for k in self.__class__.__dict__.keys():
if not (k.startswith("__") and k.endswith("__")) and not k in ("update", "pop"):
setattr(self, k, getattr(self, k))
def __setattr__(self, name, value):
if isinstance(value, (list, tuple)):
value = [self.__class__(x) if isinstance(x, dict) else x for x in value]
elif isinstance(value, dict) and not isinstance(value, self.__class__):
value = self.__class__(value)
super(EasyDict, self).__setattr__(name, value)
super(EasyDict, self).__setitem__(name, value)
__setitem__ = __setattr__
def update(self, e=None, **f):
d = e or dict()
d.update(f)
for k in d:
setattr(self, k, d[k])
def pop(self, k, d=None):
if hasattr(self, k):
delattr(self, k)
return super(EasyDict, self).pop(k, d)
if __name__ == "__main__":
import doctest
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