array_stream.py 文件源码

def array_stream(func):
    """ 
    Decorates streaming functions to make sure that the stream
    is a stream of ndarrays. Objects that are not arrays are transformed 
    into arrays. If the stream is in fact a single ndarray, this ndarray 
    is repackaged into a sequence of length 1.

    The first argument of the decorated function is assumed to be an iterable of
    arrays, or an iterable of objects that can be casted to arrays.
    """
    @wraps(func)    # thanks functools
    def decorated(arrays, *args, **kwargs):
        if isinstance(arrays, ndarray):
            arrays = (arrays,)
        return func(map(atleast_1d, arrays), *args, **kwargs)
    return decorated