from?__future__?import?division
import?torch
import?torch.nn?as?nn
import?torch.nn.functional?as?F
from?torch.autograd?import?Variable
import?numpy?as?np
from?utils?import?build_targets?to_cpu?non_max_suppression
import?darknet

class?Upsample（nn.Module）:
????“““?nn.Upsample?is?deprecated?“““

????def?__init__（self?scale_factor?mode=“bilinear“）:
????????super（Upsample?self）.__init__（）
????????self.scale_factor?=?scale_factor
????????self.mode?=?mode

????def?forward（self?x）:
????????x?=?F.interpolate（x?scale_factor=self.scale_factor?mode=self.modealign_corners=False）
????????return?x


class?Emptylayer（nn.Module）:
????“““Placeholder?for?‘route‘?and?‘shortcut‘?layers“““

????def?__init__（self）:
????????super（Emptylayer?self）.__init__（）
def?get_anchors（an