code: def add_noise(x, variance=0.1):
      """
      Function for adding gaussian noise
  
      :param x (torch.FloatTensor): Input for adding noise
      :param variance (float): Variance for adding noise
      """
  
      return x * (1 + (variance**0.5) * torch.randn_like(x))
  
label_desc: Use image node_id 1 for calling a global function with example usage: add_noise(x, variance) and returns: unknown