Andrea Crotti wrote:
On 09/23/2011 10:31 AM, Peter Otten wrote:
Inside __getattribute__() you ask for self.first_var which triggers
another
__getattribute__() call that once again trys to determine the first_var
attribute before it returns...
Try using __getattr__() instead which is only triggered for non-existent
attributes
def __getattr__(self, name):
return getattr(self.first_var, name)
or check for the attributes you don't want to delegate explicitly:
def __getattribute__(self, name):
if name == "first_var":
return super(PSIVar, self).__getattribute__(name)
Right thanks a lot it works perfectly.
I don't like too much, however, to mess around in this way, maybe it's
better if I just fork the project
and patch the original code.
In this way maybe I can also contribute to it with patches (if they
are accepted)...
Did you consider subclassing your Var class ? This is how you extend a
class behavior in OOP.
class PSIVar(var):
def __init__(self, name, desc, other=None, fun=None):
var.__init__(self, name, desc)
if other is not None:
self.other = other
self.fun = fun
assert callable(self.fun)
v1 = PSIVar('name', 'desc')
that's it.
By the way, don't create instance attribute conditionally. Your PSIVar
instance should always have a 'other' attribute, its value can be None
though.
JM
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