code: def _get_activation(activation):
      if activation == "relu":
          return t.nn.ReLU()
      elif activation == "sigmoid":
          return t.nn.Sigmoid()
      elif activation == "tanh":
          return t.nn.Tanh()
      else:
          raise ValueError(f"Unsupported activation: {activation}")
  
imports: import random
  import torch
  from torch import nn
  import numpy
  from typing import Literal
label_desc: Use image node_id 1 for calling a global function with example usage: _get_activation(activation) and returns: t, t, t