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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 tokenize(self, text: str, model: object = None):
 """ Method for tokenizing sentences with pretrained punkt models; can be overridden by language-specific tokenizers. :rtype: list :param text: text to be tokenized into sentences :type text: str :param model: tokenizer object to used # Should be in init? :type model: object """

        if not self.model:
            model = self.model

        tokenizer = self.model
        if self.lang_vars:
            tokenizer._lang_vars = self.lang_vars
        return tokenizer.tokenize(text)