code: def fn2(a, b):
      x = 0
      y = 1
  
      def modify():
          nonlocal x
          x += a + b + c
  
      for _ in range(2):
          modify()
  
      return x + y
  
file_path: pytorch/test/dynamo/test_nops.py
imports: import torch
  import torch._dynamo.test_case
  import torch._dynamo.testing
  from torch._dynamo import eval_frame
  from torch._dynamo.hooks import Hooks
label_desc: Use image node_id 2 for calling a global function with example usage: fn2(a, b) and returns: unknown