@udf_map(produces=['word'])
def split_words(tuple):
    for word in tuple.get(1).split():
        yield [word]
Internal function for updating isolation interval in cache.
dataset/ETHPy150Open twitter/pycascading/examples/word_count.py/split_words--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/polys/rootoftools.py/ComplexRootOf._set_interval