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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 set( self, params ):
 """Set the parameters for the experiment, returning the now-configured experiment. Be sure to call this base method when overriding. :param params: the parameters :returns: The experiment"""

        if self._parameters is not None:
            self.deconfigure()
        self.configure(params)
        return self