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Differences between revisions 1 and 10 (spanning 9 versions)

PatternProgramming (last edited 2008-11-15 13:59:47 by localhost)

-  ⇤ ← Revision 1 as of 2003-11-17 22:06:36 → 
  Size: 627
  Editor: yermat
  Comment:
+   ← Revision 10 as of 2003-11-18 19:38:14 → ⇥
  Size: 189
  Editor: yermat
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 3:
-= Singleton =
+= Pattern Programming =
 Line 5:
-=== classmethod ===
----
''' pro '''
+See also http://dales.rmplc.co.uk/Duncan/accu/pythonpatterns.html/
-Line 9:
+Line 7:
-You can use both as simple class or as a singleton...
+=== GoF ===
-Line 11:
+Line 9:
-----
''' cons '''



{{{
#!python
# Code is Public Domain.
class Singleton:
    _singleton = None
    
    def getSingleton(cls):
        if not Singleton._singleton:
            Singleton._singleton = cls()
        return Singleton._singleton

    getSingleton = classmethod(getSingleton)


class Test(Singleton):
    def test(self):
        print self.__class__,id(self)


t1 = Test.getSingleton()
t2 = Test.getSingleton()

t1.test()
t2.test()
}}}
+ * SingletonProgramming
 * ProxyProgramming