histogram_filling.py 文件源码

def only_bool(val):
    """ Pass input value or array only if it is a bool

    :param val: value to be evaluated
    :returns: evaluated value
    :rtype: np.bool or np.ndarray
    """

    if isinstance(val, np.bool_) or isinstance(val, bool):
        return np.bool(val)
    elif hasattr(val, '__iter__') and not isinstance(val, str):
        return np.asarray(list(filter(lambda s: isinstance(s, np.bool_) or isinstance(s, bool), val)))

    return None