python - Traits for SortedListWithKey -


i using sortedlistwithkey class new sortedcontainers module (link). there way adapt list trait specify want sortedlistwithkey(instance(someclass), key=some_key)?

to more specific, how can achieve like:

from traits.api import hastraits, instance, sortedlistwithkey # know cannot imported  class myclass(hastraits):     sorted_list = sortedlistwithkey(instance(elementclass))  

after looking @ question again, think looking way of accessing sortedlistwithkey object if list , using traits or traitsui machinery able validate/view/modify it. property trait should here allowing view sortedlistwithkey list. have modified code example below have trait property(list(str)) , view simple traitsui:

from sortedcontainers import sortedlistwithkey  traits.api import callable, hastraits, list, property, str traitsui.api import item, view   class myclass(hastraits):     sorted_list_object = sortedlistwithkey(key='key_func')      sorted_list = property(list(str), depends_on='sorted_list_object')      key_func = callable      def _get_sorted_list(self):         return list(self.sorted_list_object)      def default_key_func(self):         def first_two_characters(element):             return element[:2]         return first_two_characters      def default_traits_view(self):         view = view(             item('sorted_list', style='readonly')         )         return view   if __name__ == '__main__':     example = myclass()     example.sorted_list_object = sortedlistwithkey(         ['first', 'second', 'third', 'fourth', 'fifth']     )     example.configure_traits() 

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