def positive_timedelta(value):
    if value < timedelta(0):
        raise vol.Invalid('Time period should be positive')
    return value
Forward propagation.  This class is mostly wraps around _forward and does some extra
dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/helpers/config_validation.py/positive_timedelta--crossover with--dataset/ETHPy150Open bbabenko/simple_convnet/simple_convnet/convnet.py/Layer.forward