I have a class hierarchy. The classes in the hierarchy differ in
(amongst other things) the value of a class variable. Furthermore, I
want to be able to select the value of said class variable from a
range of allowed values for each of the classes. I've cooked up a toy
hierarchy to illustrate the point, below.
My problem is that it seems simple enough to do with class methods,
but I don't seem to be able to find a way around their absence. What's
the pythonic way to do this ?
class woderwick:
bwian = [ 'zero', 'one', 'two', 'many' ]
wodger = bwian[0] # default value
def __init__ ( self ):
print self.wodger
# This only affects the particular instance; no use
def welease_bwian ( self, N ):
self.wodger = self.bwian[N]
class rodrigo(woderwick):
bwian = [ 'cero', 'uno', 'dos', 'demasiados' ]
class roderich(woderwick):
bwian = [ 'gar nichts', 'eins', 'zwei', 'viele' ]
class roderik(roderich): # :-)
bwian = [ 'geen bal', 'een', 'twee', 'te veel' ]
class rafal(woderwick):
bwian = [ 'figa z makiem', 'raz', 'dwa', 'kupa' ]
# And so on ad tedium; ie I REALLY want to write welease_bwian only
# once for the whole hierarchy. Not too much to ask, is it? as it
# performs exactly the same function in all cases.
# Now I want to be able to say
a = woderwick() # wnat zero, get zero
b = rodrigo() # want cero, get zero
# Then I want to be able to set wodger to a given element of the
# corresponding bwian, for the whole class.
# This only works, for the base class (no surprise)
def welease_bwian( N ):
woderwick.wodger = woderwick.bwian[N]
welease_bwian( 1 )
a = woderwick() # Gives one, as required
b = rodrigo() # Gves one, rather than uno
# This only affects the temporary instance, hence useless
rodrigo().welease_bwian( 2 )
a = woderwick() # get one, want two
b = rodrigo() # get one, want dos
Suggestions welcome.
Jacek
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