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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(self, loc):
        '''Load a pickled model.'''
        try:
            w_td_c = pickle.load(open(loc, 'rb'))
        except IOError:
            msg = ("Missing trontagger.pickle file.")
            raise MissingCorpusError(msg)
        self.model.weights, self.tagdict, self.classes = w_td_c
        self.model.classes = self.classes
        return None