I though this was cool so I'd post about it, its one of the recipes
class peanutsdict(dict):
def __init__(self,default=None):
dict.__init__(self)
self.default = default
def __getitem__(self,key):
if key in self:
return dict.__getitem__(self,key)
else:
return self.default
def get(self, key, *args):
if not args:
args = (self.default,)
return dict.get(self, key, *args)
def merge(self, other):
for key in other:
if key not in self:
self[key] = other[key]
a=peanutsdict()
a.b=peanutsdict()
a.b.c=peanutsdict()
a.x=1
a.b.y=2
a.b.c.z=3
>>> print a
{}
>>> print a.__dict__
{'default': None, 'x': 1, 'b': {}}
>>> print a.b.__dict__
{'default': None, 'y': 2, 'c': {}}
>>> print a.b.c.__dict__
{'default': None, 'z': 3}
>>> print a.b.c.z
3
>>> print a.b.c
{}
>>> a.b.b=peanutsdict()
>>> class pdict(dict): pass
...
>>> a.b.b.a=pdict()
>>> a.b.b
{}
>>> a.b.b.__dict__
{'default': None, 'a': {}}
>>> a.b.b.__dict__['a']
{}
>>> a.b.b.__dict__['a'].x=4
>>> a.b.b.__dict__['a'].x
4
>>> a.b.b.a.x
4
Anyone else know anymore cool pieces of code?
-Alex Goretoy
http://www.goretoy.com
Jean Anouilh - "What you get free costs too much."
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