I have a listctrl with a columnsorter mixin - it's working fine.  Sometimes
I have to add more columns to this listctrl, which means I also need to be
able to change the number of columns recognized by the columnsorter mixin.
There's a method called SetColumnCount for this mixin, but I can't figure
out how to access it because if I initialize the mixin, it returns None, so
I don't have an instance of it.  I have tried re-doing the init with a new
number of columns, but it won't sort properly anymore.  Is there some way I
can access SetColumnCount?

initialization code (it returns None):
self.csm = listmix.ColumnSorterMixin.__init__(self, col_num)

what I've tried:

listmix.ColumnSorterMixin.SetColumnCount(new_cols) - says I need to provide
the mixin instance (duh)

self.csm.SetColumnCount(new_cols) - obviously won't work as self.csm is None

paul