Le jeudi 24 août 2006 21:02, Fredrik Lundh a écrit :
> class wrapper:
> def __init__(self, dict):
> self.dict = dict
> def __getitem__(self, key):
> try:
> return self.dict[key]
> except KeyError:
>
Quite the same idea, but without eval and the need to know the internal dict
arborescence :
In [242]: class nested_dict_wrapper :
.....: def __init__(self, dic) :
.....: self._all = [dic] + [nested_dict_wrapper(v) for v in
dic.values() if isinstance(v, dict)]
.....: def __getitem__(self, v) :
.....: for i in self._all :
.....: try : return i[v]
.....: except KeyError: pass
.....: raise KeyError(v + ' not found in dict and subdicts')
.....:
.....:
In [248]: complex_dict = { '0': 'zero', '1':'one', 'in1' : {'2':'two'}, 'in2':
{'3': 'three', '4' :'four', 'deeper':{'5':'five', '6':'six'}}, '7':'seven' }
In [250]: "%%(%s)s "*7 % tuple(range(7)) % nested_dict_wrapper(complex_dict)
Out[250]: 'zero one two three four five six '
In [251]: "%%(%s)s "*8 % tuple(range(8)) % nested_dict_wrapper(complex_dict)
Out[251]: 'zero one two three four five six seven '
In [252]: "%%(%s)s "*9 % tuple(range(9)) % nested_dict_wrapper(complex_dict)
---------------------------------------------------------------------------
exceptions.KeyError Traceback (most recent
call last)
/home/maric/<ipython console>
/home/maric/<ipython console> in __getitem__(self, v)
KeyError: '8 not found in dict and subdicts'
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