code: def __init__(self, input_channels, output_channels):
      super().__init__()
      self.conv = layers.ConvBNReLU(
          input_channels,
          output_channels,
          kernel_size=5,
          padding=2,
          bias_attr=False,
      )
  
imports: from collections import defaultdict
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddleseg.models import layers
  from paddleseg import utils
  from paddleseg.cvlibs import manager
  from ppmatting.models.losses import MRSD
label_desc: Use image node_id 1 to create a new Up object from inherited base classes: nn with example: obj = Up(input_channels, output_channels)