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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load_frombuffer(buf):
 """Loads an array dictionary or list from a buffer See more details in ``save``. Parameters buf : str Buffer containing contents of a file as a string or bytes. Returns ------- list of NDArray, RowSparseNDArray or CSRNDArray, or \ dict of str to NDArray, RowSparseNDArray or CSRNDArray Loaded data. """

    if not isinstance(buf, string_types + tuple([bytes])):
        raise TypeError('buf required to be a string or bytes')
    out_size = mx_uint()
    out_name_size = mx_uint()
    handles = ctypes.POINTER(NDArrayHandle)()
    names = ctypes.POINTER(ctypes.c_char_p)()
    check_call(_LIB.MXNDArrayLoadFromBuffer(buf,
                                            mx_uint(len(buf)),
                                            ctypes.byref(out_size),
                                            ctypes.byref(handles),
                                            ctypes.byref(out_name_size),
                                            ctypes.byref(names)))
    if out_name_size.value == 0:
        return [_ndarray_cls(NDArrayHandle(handles[i])) for i in range(out_size.value)]
    else:
        assert out_name_size.value == out_size.value
        return dict(
            (py_str(names[i]), _ndarray_cls(NDArrayHandle(handles[i])))
            for i in range(out_size.value))