Differences between revisions 2 and 11 (spanning 9 versions)

Pattern Programming

-  ⇤ ← Revision 2 as of 2003-11-17 22:09:57 → 
  Size: 755
  Editor: yermat
  Comment:
+   ← Revision 11 as of 2003-11-19 00:55:58 → ⇥
  Size: 254
  Editor: A238192
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 3:
-= Singleton =
+= Pattern Programming =
 Line 5:
-Voyez aussi http://c2.com/cgi/wiki?PythonSingleton
+See also http://dales.rmplc.co.uk/Duncan/accu/pythonpatterns.html/
 Line 7:
-=== classmethod ===
----
''' pro '''
+and http://www.thinkware.se/cgi-bin/thinki.cgi/PythonPatterns
-Line 11:
+Line 9:
-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.
+=== GoF ===
-Line 14:
+Line 11:
-----
''' 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

Page