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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 reset(cls):
 """ Reset the datasets and interface to default values. """

        cls.hide()

        cls.values = None
        cls.filename = "fn"
        cls.dc_out_el.text = ""
        cls.oai_out_el.text = ""
        cls.mrc_out_el.text = ""