def tokenize(self, split):
        """
        Tokenize String

        tokenize() is similar to strsplit(), the difference between them is that tokenize() will store the tokenized
        text into a single column making it easier for additional processing (filtering stop words, word2vec algo, ...).

        :param str split The regular expression to split on.
        @return An H2OFrame with a single column representing the tokenized Strings. Original rows of the input DF are separated by NA.
        """
        fr = H2OFrame._expr(expr=ExprNode("tokenize", self, split))
        return fr
Tokenize String

        tokenize() is similar to strsplit(), the difference between them is that tokenize() will store the tokenized
        text into a single column making it easier for additional processing (filtering stop words, word2vec algo, ...).

        :param str split The regular expression to split on.
        @return An H2OFrame with a single column representing the tokenized Strings. Original rows of the input DF are separated by NA.