dictionary - extending built-in python dict class -
i want create class extend dict's functionalities. code far: class masks(dict): def __init__(self, positive=[], negative=[]): self['positive'] = positive self['negative'] = negative i want have 2 predefined arguments in constructor: list of positive , negative masks. when execute following code, can run m = masks() and new masks-dictionary object created - that's fine. i'd able create masks objects can dicts: d = dict(one=1, two=2) but fails masks: >>> n = masks(one=1, two=2) traceback (most recent call last): file "<stdin>", line 1, in <module> typeerror: __init__() got unexpected keyword argument 'two' i should call parent constructor init somewhere in masks. init probably. tried **kwargs , passing them parent constructor, still - went wrong. point me on should add here? you must call superclass __init__ method. , if want able use masks(one=1, ..) syntax have u
