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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 train(self, *args, **kwargs):
 """Train the classifier with a labeled feature set and return the classifier. Takes the same arguments as the wrapped NLTK class. This method is implicitly called when calling ``classify`` or ``accuracy`` methods and is included only to allow passing in arguments to the ``train`` method of the wrapped NLTK class. .. versionadded:: 0.6.2 :rtype: A classifier """

        try:
            self.classifier = self.nltk_class.train(self.train_features,
                                                    *args, **kwargs)
            return self.classifier
        except AttributeError:
            raise ValueError("NLTKClassifier must have a nltk_class"
                             " variable that is not None.")