__init__ keyword param for sub-class?

[Grant Edwards]

I want to sub-class something that takes one positional and a
whole slew of keyword arguements when the object is
instantiated, and I want to add one keyword argument (keyword
'myoption' in the below example) to be handled by my method,
and pass the rest on the the super-class.  I couldn't find any
examples of this type of thing, so this is what I came up with:

class execWindow(Pmw.ScrolledText):
    
    def __init__(self, *posArgs, **keyArgs):
        
        if keyArgs.has_key('myoption'):
            self.__myoption = keyArgs['myoption']
            del keyArgs['myoption']
            
        return apply(Pmw.ScrolledText.__init__, (self,) + posArgs, keyArgs)

    [ various other methods and stuff ]
    
Is this the "right" way to do this?

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