def log(x):
    return tf.log(x)
test that fetching data in chunks returns the correct results
dataset/ETHPy150Open fchollet/keras/keras/backend/tensorflow_backend.py/log--crossover with--dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/cx_Oracle-5.1.2/test/StringVar.py/TestStringVar.testFetchMany