code: def test_attention_pos_0_sz_0(self):
      Attention(128, 8)(
          Tensor.ones(1, 0, 128),
          Variable("start_pos", 0, 128).bind(0),
          None,
      )
  
imports: import unittest
  from tinygrad.shape.symbolic import Variable
  from tinygrad.helpers import getenv
  from tinygrad.tensor import Tensor
  from examples.gpt2 import Attention
  import numpy
label_desc: Use image node_id 6 for calling the TestSymbolicOps obj's underlying member method code with example usage: obj.test_attention_pos_0_sz_0() without return types