code: def conv1x1(in_channels, out_channels):
      return nn.Conv2d(
          in_channels=in_channels,
          out_channels=out_channels,
          kernel_size=1,
          bias=False,
      )
  
imports: import numpy
  from torch.autograd import Variable
  from pytorch2keras.converter import pytorch_to_keras
  import torch
  import torch.nn
  import torch.nn.functional
  import torch.nn.init
label_desc: Use image node_id 4 for calling a global function with example usage: conv1x1(in_channels, out_channels) and returns: nn