code: def gelu_accurate(x):
      if not hasattr(gelu_accurate, "_a"):
          gelu_accurate._a = math.sqrt(2 / math.pi)
      return (
          0.5
          * x
          * (
              1
              + torch.tanh(
                  gelu_accurate._a * (x + 0.044715 * torch.pow(x, 3))
              )
          )
      )
  
imports: import math
  import torch
  import torch.nn
label_desc: Use image node_id 1 for calling a global function with example usage: gelu_accurate(x) and returns: unknown