code: def test_attention_training(self):
      with Tensor.train():
          self.test_attention(dropout_p=0.0)
          with self.assertRaises(AssertionError):
              # symbolic shape dropout is not supported
              self.test_attention(dropout_p=0.5)
  
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 5 for calling the TestSymbolicOps obj's underlying member method code with example usage: obj.test_attention_training() without return types