Re: Is there a way to specify a superclass at runtime?

[MRAB]

Chris Colbert wrote:

because when i import this module, the classes will already be
determined by the intitial flag setting.

i.e.
SIMULATION = False

class SimController(object):
   def foo(self):
       print 'bar'

class RealController(object):
   def foo(self):
       print 'baz'

if SIMULATION:
   SuperKlass = SimController
else:
   SuperKlass = RealController

class Controller(SuperKlass):
   pass





In [2]: import testcontroller

In [3]: testcontroller.SIMULATION
Out[3]: False

In [4]: c = testcontroller.Controller()

In [5]: c.foo()
baz

In [6]: testcontroller.SIMULATION = True

In [7]: c = testcontroller.Controller()

In [8]: c.foo()
baz

[snip]
You could put the Controller class inside a factory function:

def Controller():
        if SIMULATION:
                SuperKlass = SimController
        else:
                SuperKlass = RealController
        class Controller(SuperKlass):
                pass
        return Controller()
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