def shout(msg, f=sys.stderr):
    print >> f, "{0}: {1}".format(_PROG, msg)
    f.flush()
Validates that a specified value is valid for this trait.
dataset/ETHPy150Open axialmarket/fsq/libexec/fsq/down.py/shout--crossover with--dataset/ETHPy150Open enthought/traits/traits/trait_types.py/BaseCComplex.validate