overloading __getattr__ and inheriting from dict

[Benoît Dejean]

class TargetWrapper(dict):

def __init__(self, **kwargs):
dict.__init__(self, kwargs)

__getattr__ = dict.__getitem__
__setattr__ = dict.__setitem__
__delattr__ = dict.__delitem__

then

tw = TargetWrapper()
tw.a = "spam" # ok
del tw.a # ok
tw.b = "egg"
print tw.b

last line give me an
AttributeError: 'TargetWrapper' object has no attribute 'b'

if i define

def __getitem__(self, name):
return dict.__getitem__(self, name)

__getattr__ = __getitem__

then the accessing the b attribute is ok. what's wrong ?

[Michael Hudson]

Benoît Dejean <bn********@ifrance.com> writes:

class TargetWrapper(dict):

def __init__(self, **kwargs):
dict.__init__(self, kwargs)

__getattr__ = dict.__getitem__
__setattr__ = dict.__setitem__
__delattr__ = dict.__delitem__

then

tw = TargetWrapper()
tw.a = "spam" # ok
del tw.a # ok
tw.b = "egg"
print tw.b

last line give me an
AttributeError: 'TargetWrapper' object has no attribute 'b'

if i define

def __getitem__(self, name):
return dict.__getitem__(self, name)

__getattr__ = __getitem__

then the accessing the b attribute is ok. what's wrong ?

I'm not sure, but changing

__getattr__ = dict.__getitem__

to

__getattribute__ = dict.__getitem__

makes things behave more like I think you expect.

Cheers,
mwh

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