code: def test_dirichlet_grad_cuda():
      concentration = torch.ones(3, requires_grad=True)
      dist.Dirichlet(concentration).rsample().sum().backward()
  
imports: import pytest
  import torch
  import pyro.distributions
  from tests.common import assert_close, requires_cuda
label_desc: Use image node_id 1 for calling a global function with example usage: test_dirichlet_grad_cuda() without return types