def isreal(ds):
    ds = launder(ds)
    return isinstance(ds, Unit) and ds in floating
Test that a logged error gets reported as a test error.
dataset/ETHPy150Open blaze/datashape/datashape/predicates.py/isreal--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/trial/test/test_log.py/LogErrors.test_singleError