<[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> An implementation of what you want can be found here:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52558
>
I think this recipe pre-dates the introduction of __new__ in Python.
How about something like this (requires the name to be the first constructor
argument):
-------------------------------------------
class RegisteredObject(object):
registry = {}
def __new__(cls,name,*args,**kwargs):
if name not in cls.registry:
cls.registry[name] = object.__new__(cls)
return cls.registry[name]
class foo (RegisteredObject):
def __init__(self,name):
self.myName = name
def yo(self):
return self.myName
def main():
a = foo( "test" )
print "ATTR:", a.yo()
print id(a)
b = foo( "test" )
print "ATTR:", b.yo()
print id(b)
c = foo( "test2" )
print "ATTR:", c.yo()
print id(c)
if __name__ == "__main__":
main()
----------------------------------------------
gives:
ATTR: test
7886256
ATTR: test
7886256
ATTR: test2
7887984
-- Paul
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