code: def conv3x3(in_, out):
      return nn.Conv2d(in_, out, 3, padding=1)
  
imports: from torch import nn
  from torch.nn import functional
  import torch
  from torchvision import models
  from torchvision.models import resnet34, resnet101, resnet50, resnet152
  import torchvision
label_desc: Use image node_id 1 for calling a global function with example usage: conv3x3(in_, out) and returns: nn