code: def quadratic(tensor):
      x, y = tensor
      a = 1.0
      b = 1.0
      return (x**2) / a + (y**2) / b
  
file_path: pytorch-optimizer/tests/test_basic.py
imports: import pytest
  import torch
  import torch_optimizer
label_desc: Use image node_id 2 for calling a global function with example usage: quadratic(tensor) and returns: unknown