On 10/19/2010 9:39 AM, Lucasm wrote:
Hi,
A question. Is it possible to dynamically override a property?
class A(object):
@property
def return_five(self):
return 5
I would like to override the property for an instance of A to say the
string 'bla'.
Is this the sort of thing you're looking for ...
#-------------------------------------
import inspect
class A(object):
@property
def return_five(self):
try:
# get name of this function ...
frm = inspect.getframeinfo(inspect.currentframe())
# ... and use it as dict key
return self.__dict__[frm.function]
except KeyError:
# attr not set in instance
return 5
a = A()
print "one:", a.return_five
b = A()
b.__dict__['return_five'] = 'bla'
print "two:", b.return_five
c = A()
print "three:", c.return_five
#-------------------------------------
The output is:
one: 5
two: bla
three: 5
If you don't want to fool around with the inspect module, you can
hard-code the function name as the instance's dict key:
return self.__dict__['return_five']
HTH,
John
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