Xavier Décoret a écrit :
> Bruno Desthuilliers a écrit :
>
(snip)
>> I really wonder what it can be ???
>
> It's the ability to develop the equivalent of GeoNext (and much more) in
> Python with a very nice syntax.
This is nice, but this does not explain the why of your code snippet.
>>
>> You could achieve the same effect with:
>>
>> class A( object):
>> def __init__(self, value):
>> self.value = value
>>
>> a = A(3)
>> a.value = 4
>> a.value
>> => 4
>>
>
> Of course, and even simpler ;-)
> print "4"
of course !-)
> More seriously, try to do this with your simpler approach.
>
> a = A(4)
> b = A(lambda : a.x+5)
> a.x = 2
>
> print b.x # I want this to be 7, not 9
I may miss the point, but what about:
class A(object):
def __init__(self, x):
self.x = x
def _getx(self):
if callable(self._x):
return self._x()
else:
return self._x
def _setx(self, x):
self._x = x
x = property(_getx, _setx)
a = A(4)
b = A(lambda : a.x+5)
a.x = 2
print "b.x is", b.x
<have-fun with="lambdas">
#... and now for the fine part:
del a
b.x
But what, your solution behaves just the same.
</have-fun>
>> Ever googled for "evolution of a programmer" ?-)
>>
> Not to brag, but I think I know what programming is.
I don't have any reason to doubt it. But do you know what not
programming is ?-)
> C'est bien un commentaire de francais ca ;-)
<gaston>Meuhnon</gaston>
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