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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load(cls, webfinger, pypump):
 """ Load JSON from disk into store object """

        filename = cls.get_filename()

        if os.path.isfile(filename):
            data = open(filename).read()
            data = json.loads(data)
            store = cls(data, filename=filename)
        else:
            store = cls(filename=filename)

        store.prefix = webfinger
        return store