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# -*- coding: utf-8 -*-
# Copyright (c) Facebook, Inc. and its affiliates.
from collections import namedtuple
class ShapeSpec(namedtuple("_ShapeSpec", ["channels", "height", "width", "stride"])):
"""
A simple structure that contains basic shape specification about a tensor.
It is often used as the auxiliary inputs/outputs of models,
to complement the lack of shape inference ability among pytorch modules.
Attributes:
channels:
height:
width:
stride:
"""
def __new__(cls, channels=None, height=None, width=None, stride=None):
return super().__new__(cls, channels, height, width, stride)