|
Size: 755
Comment:
|
Size: 761
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 11: | Line 11: |
| You can use both as simple class or as a singleton. You do not need to write code for each class you want to act as singleton. |
* You can use both as simple class or as a singleton. * You do not need to write code for each class you want to act as singleton. |
Singleton
Voyez aussi http://c2.com/cgi/wiki?PythonSingleton
classmethod
pro
- You can use both as simple class or as a singleton.
- You do not need to write code for each class you want to act as singleton.
cons
1 # Code is Public Domain.
2 class Singleton:
3 _singleton = None
4
5 def getSingleton(cls):
6 if not Singleton._singleton:
7 Singleton._singleton = cls()
8 return Singleton._singleton
9
10 getSingleton = classmethod(getSingleton)
11
12
13 class Test(Singleton):
14 def test(self):
15 print self.__class__,id(self)
16
17
18 t1 = Test.getSingleton()
19 t2 = Test.getSingleton()
20
21 t1.test()
22 t2.test()