• Eman2FactoriesInPython

{{{!#python >>f=EMAbstractFactory()

• >>class A:pass >>f.register("createA",A) >>f.createA() <main.A instance at 01491E7C>

  >>> class B:

• .. def init(self, a,b=1):

• .. self.a=a
• .. self.b=b
• ..

  >>> f.register("createB",B,1,b=2) >>> f.createB() >>> b=f.createB() >>> >>> b.a 1 >>> b.b 2

  >>> class C:

• .. def init(self,a,b,c=1,d=2):

• .. self.values = (a,b,c,d)
• ..

  >>> f.register("createC",C,1,c=3) >>> c=f.createC(2,d=4) >>> c.values (1, 2, 3, 4)

  >>> f.register("importSerialization",import,"cPickle") >>> pickle=f.importSerialization() >>> pickle <module 'cPickle' (built-in)> >>> f.register("importSerialization",import,"marshal") >>> pickle=f.importSerialization() >>> pickle <module 'marshal' (built-in)>

  >>> f.unregister("importSerialization") >>> f.importSerialization() Traceback (most recent call last):

  • File "<interactive input>", line 1, in ?

  AttributeError: Factory instance has no attribute 'importSerialization'

}}}