1         >>f=EMAbstractFactory()
   2         >>class A:pass
   3         >>f.register("createA",A)
   4         >>f.createA()
   5         <__main__.A instance at 01491E7C>
   6         
   7         >>> class B:
   8         ...     def __init__(self, a,b=1):
   9         ...             self.a=a
  10         ...             self.b=b
  11         ...             
  12         >>> f.register("createB",B,1,b=2)
  13         >>> f.createB()
  14         >>> b=f.createB()
  15         >>> 
  16         >>> b.a
  17         1
  18         >>> b.b
  19         2
  20         
  21         >>> class C:
  22         ...     def __init__(self,a,b,c=1,d=2):
  23         ...             self.values = (a,b,c,d)
  24         ... 
  25         >>> f.register("createC",C,1,c=3)
  26         >>> c=f.createC(2,d=4)
  27         >>> c.values
  28         (1, 2, 3, 4)
  29         
  30         >>> f.register("importSerialization",__import__,"cPickle")
  31         >>> pickle=f.importSerialization()
  32         >>> pickle
  33         <module 'cPickle' (built-in)>
  34         >>> f.register("importSerialization",__import__,"marshal")
  35         >>> pickle=f.importSerialization()
  36         >>> pickle
  37         <module 'marshal' (built-in)>
  38         
  39         >>> f.unregister("importSerialization")
  40         >>> f.importSerialization()
  41         Traceback (most recent call last):
  42           File "<interactive input>", line 1, in 
  43         AttributeError: Factory instance has no attribute 'importSerialization'